diff --git a/assets/scripts/artifacts/bag_of_holding.lua b/assets/scripts/artifacts/bag_of_holding.lua
index 24aaf86..120955c 100644
--- a/assets/scripts/artifacts/bag_of_holding.lua
+++ b/assets/scripts/artifacts/bag_of_holding.lua
@@ -11,4 +11,4 @@ register_artifact("BAG_OF_HOLDING", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/deflector_shield.lua b/assets/scripts/artifacts/deflector_shield.lua
index 89d1229..65b1a23 100644
--- a/assets/scripts/artifacts/deflector_shield.lua
+++ b/assets/scripts/artifacts/deflector_shield.lua
@@ -11,4 +11,4 @@ register_artifact("DEFLECTOR_SHIELD", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/gigantic_strength.lua b/assets/scripts/artifacts/gigantic_strength.lua
index 0757e88..0fda009 100644
--- a/assets/scripts/artifacts/gigantic_strength.lua
+++ b/assets/scripts/artifacts/gigantic_strength.lua
@@ -11,4 +11,4 @@ register_artifact("GIGANTIC_STRENGTH", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/gold_converter.lua b/assets/scripts/artifacts/gold_converter.lua
index 15f6ba0..95d581e 100644
--- a/assets/scripts/artifacts/gold_converter.lua
+++ b/assets/scripts/artifacts/gold_converter.lua
@@ -11,4 +11,4 @@ register_artifact("GOLD_CONVERTER", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/holy_grail.lua b/assets/scripts/artifacts/holy_grail.lua
index 9f88a6b..d8fcb5e 100644
--- a/assets/scripts/artifacts/holy_grail.lua
+++ b/assets/scripts/artifacts/holy_grail.lua
@@ -11,4 +11,4 @@ register_artifact("HOLY_GRAIL", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/juicy_fruit.lua b/assets/scripts/artifacts/juicy_fruit.lua
index a628812..f6e5815 100644
--- a/assets/scripts/artifacts/juicy_fruit.lua
+++ b/assets/scripts/artifacts/juicy_fruit.lua
@@ -9,4 +9,4 @@ register_artifact("JUICY_FRUIT", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/radiant_seed.lua b/assets/scripts/artifacts/radiant_seed.lua
index 81398e6..9ffe4d5 100644
--- a/assets/scripts/artifacts/radiant_seed.lua
+++ b/assets/scripts/artifacts/radiant_seed.lua
@@ -9,4 +9,4 @@ register_artifact("RADIANT_SEED", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/repulsion_stone.lua b/assets/scripts/artifacts/repulsion_stone.lua
index ce08a8f..42e186e 100644
--- a/assets/scripts/artifacts/repulsion_stone.lua
+++ b/assets/scripts/artifacts/repulsion_stone.lua
@@ -11,4 +11,4 @@ register_artifact("REPULSION_STONE", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/short_radiance.lua b/assets/scripts/artifacts/short_radiance.lua
index 8a9cba5..cccbf93 100644
--- a/assets/scripts/artifacts/short_radiance.lua
+++ b/assets/scripts/artifacts/short_radiance.lua
@@ -13,4 +13,4 @@ register_artifact("SHORT_RADIANCE", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/artifacts/spiked_plant.lua b/assets/scripts/artifacts/spiked_plant.lua
index 0993155..0c0fc6c 100644
--- a/assets/scripts/artifacts/spiked_plant.lua
+++ b/assets/scripts/artifacts/spiked_plant.lua
@@ -11,4 +11,4 @@ register_artifact("SPIKED_PLANT", {
             return nil
         end
     }
-});
\ No newline at end of file
+});
diff --git a/assets/scripts/cards/_debug.lua b/assets/scripts/cards/_debug.lua
index c627c86..c4419c1 100644
--- a/assets/scripts/cards/_debug.lua
+++ b/assets/scripts/cards/_debug.lua
@@ -15,4 +15,4 @@ register_card("KILL", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/berserker_rage.lua b/assets/scripts/cards/berserker_rage.lua
index 33a6e68..da2ad60 100644
--- a/assets/scripts/cards/berserker_rage.lua
+++ b/assets/scripts/cards/berserker_rage.lua
@@ -3,7 +3,7 @@ register_card("BERSERKER_RAGE", {
     description = "Gain " .. highlight("3 energy") .. ", but take 30% (-10% per level) of your HP as damage.",
     state = function(ctx)
         return "Gain " .. highlight("3 energy") .. ", but take " .. highlight(tostring(30 - ctx.level * 10) .. "%") .. " (" ..
-                tostring(get_player().hp * (0.3 - ctx.level * 0.1)) .. ") of your HP as damage."
+                   tostring(get_player().hp * (0.3 - ctx.level * 0.1)) .. ") of your HP as damage."
     end,
     max_level = 0,
     color = "#d8a448",
@@ -17,4 +17,4 @@ register_card("BERSERKER_RAGE", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/block.lua b/assets/scripts/cards/block.lua
index 9a551d4..7859fdd 100644
--- a/assets/scripts/cards/block.lua
+++ b/assets/scripts/cards/block.lua
@@ -15,4 +15,4 @@ register_card("BLOCK", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/block_spikes.lua b/assets/scripts/cards/block_spikes.lua
index f7eac83..efba7cf 100644
--- a/assets/scripts/cards/block_spikes.lua
+++ b/assets/scripts/cards/block_spikes.lua
@@ -46,4 +46,4 @@ register_card("BLOCK_SPIKES", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/combined_shot.lua b/assets/scripts/cards/combined_shot.lua
index e983c2e..90aeb64 100644
--- a/assets/scripts/cards/combined_shot.lua
+++ b/assets/scripts/cards/combined_shot.lua
@@ -15,4 +15,4 @@ register_card("COMBINED_SHOT", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/fear.lua b/assets/scripts/cards/fear.lua
index 709e86b..6b86d04 100644
--- a/assets/scripts/cards/fear.lua
+++ b/assets/scripts/cards/fear.lua
@@ -15,4 +15,4 @@ register_card("FEAR", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/melee_hit.lua b/assets/scripts/cards/melee_hit.lua
index 7feb35a..d7ca9e2 100644
--- a/assets/scripts/cards/melee_hit.lua
+++ b/assets/scripts/cards/melee_hit.lua
@@ -15,4 +15,4 @@ register_card("MELEE_HIT", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/radiant_seed.lua b/assets/scripts/cards/radiant_seed.lua
index 1a7bd53..acb2b0e 100644
--- a/assets/scripts/cards/radiant_seed.lua
+++ b/assets/scripts/cards/radiant_seed.lua
@@ -3,7 +3,7 @@ register_card("RADIANT_SEED", {
     description = "Inflict 10 (+2 for each upgrade) damage to all enemies, but also causes 5 (-2 for each upgrade) damage to the caster.",
     state = function(ctx)
         return "Inflict " .. highlight(10 + ctx.level * 2) .. " damage to all enemies, but also causes " .. highlight(5 - ctx.level * 2) ..
-                " damage to the caster."
+                   " damage to the caster."
     end,
     max_level = 1,
     color = "#82c93e",
@@ -19,4 +19,4 @@ register_card("RADIANT_SEED", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/rupture.lua b/assets/scripts/cards/rupture.lua
index 2c453c7..3e164d5 100644
--- a/assets/scripts/cards/rupture.lua
+++ b/assets/scripts/cards/rupture.lua
@@ -15,4 +15,4 @@ register_card("RUPTURE", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/cards/shield_bash.lua b/assets/scripts/cards/shield_bash.lua
index edff7a6..edf5811 100644
--- a/assets/scripts/cards/shield_bash.lua
+++ b/assets/scripts/cards/shield_bash.lua
@@ -1,10 +1,10 @@
 register_card("SHIELD_BASH", {
     name = "Shield Bash",
     description = "Deal 4 (+2 for each upgrade) damage to the enemy and gain " .. highlight("block") ..
-            " status effect equal to the damage dealt.",
+        " status effect equal to the damage dealt.",
     state = function(ctx)
         return "Deal " .. highlight(4 + ctx.level * 2) .. " damage to the enemy and gain " .. highlight("block") ..
-                " status effect equal to the damage dealt."
+                   " status effect equal to the damage dealt."
     end,
     max_level = 1,
     color = "#ff5722",
@@ -18,4 +18,4 @@ register_card("SHIELD_BASH", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/enemies/clean_bot.lua b/assets/scripts/enemies/clean_bot.lua
index 748e5a2..668e7e1 100644
--- a/assets/scripts/enemies/clean_bot.lua
+++ b/assets/scripts/enemies/clean_bot.lua
@@ -34,4 +34,4 @@ register_enemy("CLEAN_BOT", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/enemies/shadow_assasin.lua b/assets/scripts/enemies/shadow_assasin.lua
index 6ccc36d..ab7351e 100644
--- a/assets/scripts/enemies/shadow_assasin.lua
+++ b/assets/scripts/enemies/shadow_assasin.lua
@@ -62,4 +62,4 @@ register_status_effect("BLEED", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/libs/fun.lua b/assets/scripts/libs/fun.lua
index 60fa333..db396a2 100644
--- a/assets/scripts/libs/fun.lua
+++ b/assets/scripts/libs/fun.lua
@@ -5,7 +5,6 @@
 ---
 --- Distributed under the MIT/X11 License. See COPYING.md for more details.
 ---
-
 local exports = {}
 local methods = {}
 
@@ -48,20 +47,16 @@ local iterator_mt = {
     -- usually called by for-in loop
     __call = function(self, param, state)
         return self.gen(param, state)
-    end;
+    end,
     __tostring = function(self)
         return '<generator>'
-    end;
+    end,
     -- add all exported methods
-    __index = methods;
+    __index = methods
 }
 
 local wrap = function(gen, param, state)
-    return setmetatable({
-        gen = gen,
-        param = param,
-        state = state
-    }, iterator_mt), param, state
+    return setmetatable({ gen = gen, param = param, state = state }, iterator_mt), param, state
 end
 exports.wrap = wrap
 
@@ -124,8 +119,7 @@ local rawiter = function(obj, param, state)
         end
         return string_gen, obj, 0
     end
-    error(string.format('object %s of type "%s" is not iterable',
-            obj, type(obj)))
+    error(string.format('object %s of type "%s" is not iterable', obj, type(obj)))
 end
 
 local iter = function(obj, param, state)
@@ -221,9 +215,9 @@ local range = function(start, stop, step)
     assert(step ~= 0, "step must not be zero")
 
     if (step > 0) then
-        return wrap(range_gen, {stop, step}, start - step)
+        return wrap(range_gen, { stop, step }, start - step)
     elseif (step < 0) then
-        return wrap(range_rev_gen, {stop, step}, start - step)
+        return wrap(range_rev_gen, { stop, step }, start - step)
     end
 end
 exports.range = range
@@ -244,7 +238,7 @@ local duplicate = function(...)
     if select('#', ...) <= 1 then
         return wrap(duplicate_gen, select(1, ...), 0)
     else
-        return wrap(duplicate_table_gen, {...}, 0)
+        return wrap(duplicate_table_gen, { ... }, 0)
     end
 end
 exports.duplicate = duplicate
@@ -287,7 +281,7 @@ local rands = function(n, m)
         assert(type(m) == "number", "invalid second arg to rands")
     end
     assert(n < m, "empty interval")
-    return wrap(rands_gen, {n, m - 1}, 0)
+    return wrap(rands_gen, { n, m - 1 }, 0)
 end
 exports.rands = rands
 
@@ -307,7 +301,7 @@ local nth = function(n, gen_x, param_x, state_x)
             return nil
         end
     end
-    for i=1,n-1,1 do
+    for i = 1, n - 1, 1 do
         state_x = gen_x(param_x, state_x)
         if state_x == nil then
             return nil
@@ -349,7 +343,7 @@ local take_n_gen_x = function(i, state_x, ...)
     if state_x == nil then
         return nil
     end
-    return {i, state_x}, ...
+    return { i, state_x }, ...
 end
 
 local take_n_gen = function(param, state)
@@ -363,7 +357,7 @@ end
 
 local take_n = function(n, gen, param, state)
     assert(n >= 0, "invalid first argument to take_n")
-    return wrap(take_n_gen, {n, gen, param}, {0, state})
+    return wrap(take_n_gen, { n, gen, param }, { 0, state })
 end
 methods.take_n = method1(take_n)
 exports.take_n = export1(take_n)
@@ -382,7 +376,7 @@ end
 
 local take_while = function(fun, gen, param, state)
     assert(type(fun) == "function", "invalid first argument to take_while")
-    return wrap(take_while_gen, {fun, gen, param}, state)
+    return wrap(take_while_gen, { fun, gen, param }, state)
 end
 methods.take_while = method1(take_while)
 exports.take_while = export1(take_while)
@@ -400,7 +394,7 @@ exports.take = export1(take)
 local drop_n = function(n, gen, param, state)
     assert(n >= 0, "invalid first argument to drop_n")
     local i
-    for i=1,n,1 do
+    for i = 1, n, 1 do
         state = gen(param, state)
         if state == nil then
             return wrap(nil_gen, nil, nil)
@@ -444,8 +438,7 @@ methods.drop = method1(drop)
 exports.drop = export1(drop)
 
 local split = function(n_or_fun, gen_x, param_x, state_x)
-    return take(n_or_fun, gen_x, param_x, state_x),
-    drop(n_or_fun, gen_x, param_x, state_x)
+    return take(n_or_fun, gen_x, param_x, state_x), drop(n_or_fun, gen_x, param_x, state_x)
 end
 methods.split = method1(split)
 exports.split = export1(split)
@@ -486,13 +479,13 @@ local indexes_gen = function(param, state)
         end
         i = i + 1
         if r == x then
-            return {i, state_x}, i
+            return { i, state_x }, i
         end
     end
 end
 
 local indexes = function(x, gen, param, state)
-    return wrap(indexes_gen, {x, gen, param}, {0, state})
+    return wrap(indexes_gen, { x, gen, param }, { 0, state })
 end
 methods.indexes = method1(indexes)
 exports.indexes = export1(indexes)
@@ -509,7 +502,9 @@ exports.elem_indices = exports.indexes
 
 local filter1_gen = function(fun, gen_x, param_x, state_x, a)
     while true do
-        if state_x == nil or fun(a) then break; end
+        if state_x == nil or fun(a) then
+            break
+        end
         state_x, a = gen_x(param_x, state_x)
     end
     return state_x, a
@@ -545,7 +540,7 @@ local filter_gen = function(param, state_x)
 end
 
 local filter = function(fun, gen, param, state)
-    return wrap(filter_gen, {fun, gen, param}, state)
+    return wrap(filter_gen, { fun, gen, param }, state)
 end
 methods.filter = method1(filter)
 exports.filter = export1(filter)
@@ -555,7 +550,9 @@ exports.remove_if = exports.filter
 local grep = function(fun_or_regexp, gen, param, state)
     local fun = fun_or_regexp
     if type(fun_or_regexp) == "string" then
-        fun = function(x) return string.find(x, fun_or_regexp) ~= nil end
+        fun = function(x)
+            return string.find(x, fun_or_regexp) ~= nil
+        end
     end
     return filter(fun, gen, param, state)
 end
@@ -566,8 +563,7 @@ local partition = function(fun, gen, param, state)
     local neg_fun = function(...)
         return not fun(...)
     end
-    return filter(fun, gen, param, state),
-    filter(neg_fun, gen, param, state)
+    return filter(fun, gen, param, state), filter(neg_fun, gen, param, state)
 end
 methods.partition = method1(partition)
 exports.partition = export1(partition)
@@ -587,7 +583,7 @@ local foldl = function(fun, start, gen_x, param_x, state_x)
     while true do
         state_x, start = foldl_call(fun, start, gen_x(param_x, state_x))
         if state_x == nil then
-            break;
+            break
         end
     end
     return start
@@ -622,7 +618,7 @@ local is_prefix_of = function(iter_x, iter_y)
     local gen_y, param_y, state_y = iter(iter_y)
 
     local r_x, r_y
-    for i=1,10,1 do
+    for i = 1, 10, 1 do
         state_x, r_x = gen_x(param_x, state_x)
         state_y, r_y = gen_y(param_y, state_y)
         if state_x == nil then
@@ -685,11 +681,19 @@ methods.product = method0(product)
 exports.product = export0(product)
 
 local min_cmp = function(m, n)
-    if n < m then return n else return m end
+    if n < m then
+        return n
+    else
+        return m
+    end
 end
 
 local max_cmp = function(m, n)
-    if n > m then return n else return m end
+    if n > m then
+        return n
+    else
+        return m
+    end
 end
 
 local min = function(gen, param, state)
@@ -810,7 +814,7 @@ local map_gen = function(param, state)
 end
 
 local map = function(fun, gen, param, state)
-    return wrap(map_gen, {gen, param, fun}, state)
+    return wrap(map_gen, { gen, param, fun }, state)
 end
 methods.map = method1(map)
 exports.map = export1(map)
@@ -819,7 +823,7 @@ local enumerate_gen_call = function(state, i, state_x, ...)
     if state_x == nil then
         return nil
     end
-    return {i + 1, state_x}, i, ...
+    return { i + 1, state_x }, i, ...
 end
 
 local enumerate_gen = function(param, state)
@@ -829,7 +833,7 @@ local enumerate_gen = function(param, state)
 end
 
 local enumerate = function(gen, param, state)
-    return wrap(enumerate_gen, {gen, param}, {1, state})
+    return wrap(enumerate_gen, { gen, param }, { 1, state })
 end
 methods.enumerate = method0(enumerate)
 exports.enumerate = export0(enumerate)
@@ -838,14 +842,14 @@ local intersperse_call = function(i, state_x, ...)
     if state_x == nil then
         return nil
     end
-    return {i + 1, state_x}, ...
+    return { i + 1, state_x }, ...
 end
 
 local intersperse_gen = function(param, state)
     local x, gen_x, param_x = param[1], param[2], param[3]
     local i, state_x = state[1], state[2]
     if i % 2 == 1 then
-        return {i + 1, state_x}, x
+        return { i + 1, state_x }, x
     else
         return intersperse_call(i, gen_x(param_x, state_x))
     end
@@ -853,7 +857,7 @@ end
 
 -- TODO: interperse must not add x to the tail
 local intersperse = function(x, gen, param, state)
-    return wrap(intersperse_gen, {x, gen, param}, {0, state})
+    return wrap(intersperse_gen, { x, gen, param }, { 0, state })
 end
 methods.intersperse = method1(intersperse)
 exports.intersperse = export1(intersperse)
@@ -888,8 +892,7 @@ local numargs = function(...)
     if n >= 3 then
         -- Fix last argument
         local it = select(n - 2, ...)
-        if type(it) == 'table' and getmetatable(it) == iterator_mt and
-                it.param == select(n - 1, ...) and it.state == select(n, ...) then
+        if type(it) == 'table' and getmetatable(it) == iterator_mt and it.param == select(n - 1, ...) and it.state == select(n, ...) then
             return n - 2
         end
     end
@@ -905,7 +908,7 @@ local zip = function(...)
     local state = { [n] = 0 }
 
     local i, gen_x, param_x, state_x
-    for i=1,n,1 do
+    for i = 1, n, 1 do
         local it = select(n - i + 1, ...)
         gen_x, param_x, state_x = rawiter(it)
         param[2 * i - 1] = gen_x
@@ -932,7 +935,7 @@ local cycle_gen = function(param, state_x)
 end
 
 local cycle = function(gen, param, state)
-    return wrap(cycle_gen, {gen, param, state}, deepcopy(state))
+    return wrap(cycle_gen, { gen, param, state }, deepcopy(state))
 end
 methods.cycle = method0(cycle)
 exports.cycle = export0(cycle)
@@ -947,9 +950,9 @@ local chain_gen_r2 = function(param, state, state_x, ...)
             return nil
         end
         local state_x = param[3 * i]
-        return chain_gen_r1(param, {i, state_x})
+        return chain_gen_r1(param, { i, state_x })
     end
-    return {state[1], state_x}, ...
+    return { state[1], state_x }, ...
 end
 
 chain_gen_r1 = function(param, state)
@@ -966,7 +969,7 @@ local chain = function(...)
 
     local param = { [3 * n] = 0 }
     local i, gen_x, param_x, state_x
-    for i=1,n,1 do
+    for i = 1, n, 1 do
         local elem = select(i, ...)
         gen_x, param_x, state_x = iter(elem)
         param[3 * i - 2] = gen_x
@@ -974,7 +977,7 @@ local chain = function(...)
         param[3 * i] = state_x
     end
 
-    return wrap(chain_gen_r1, param, {1, param[3]})
+    return wrap(chain_gen_r1, param, { 1, param[3] })
 end
 methods.chain = chain
 exports.chain = chain
@@ -987,45 +990,95 @@ local operator = {
     ----------------------------------------------------------------------------
     -- Comparison operators
     ----------------------------------------------------------------------------
-    lt  = function(a, b) return a < b end,
-    le  = function(a, b) return a <= b end,
-    eq  = function(a, b) return a == b end,
-    ne  = function(a, b) return a ~= b end,
-    ge  = function(a, b) return a >= b end,
-    gt  = function(a, b) return a > b end,
+    lt = function(a, b)
+        return a < b
+    end,
+    le = function(a, b)
+        return a <= b
+    end,
+    eq = function(a, b)
+        return a == b
+    end,
+    ne = function(a, b)
+        return a ~= b
+    end,
+    ge = function(a, b)
+        return a >= b
+    end,
+    gt = function(a, b)
+        return a > b
+    end,
 
     ----------------------------------------------------------------------------
     -- Arithmetic operators
     ----------------------------------------------------------------------------
-    add = function(a, b) return a + b end,
-    div = function(a, b) return a / b end,
-    floordiv = function(a, b) return math.floor(a/b) end,
+    add = function(a, b)
+        return a + b
+    end,
+    div = function(a, b)
+        return a / b
+    end,
+    floordiv = function(a, b)
+        return math.floor(a / b)
+    end,
     intdiv = function(a, b)
         local q = a / b
-        if a >= 0 then return math.floor(q) else return math.ceil(q) end
+        if a >= 0 then
+            return math.floor(q)
+        else
+            return math.ceil(q)
+        end
+    end,
+    mod = function(a, b)
+        return a % b
+    end,
+    mul = function(a, b)
+        return a * b
+    end,
+    neq = function(a)
+        return -a
+    end,
+    unm = function(a)
+        return -a
+    end, -- an alias
+    pow = function(a, b)
+        return a ^ b
+    end,
+    sub = function(a, b)
+        return a - b
+    end,
+    truediv = function(a, b)
+        return a / b
     end,
-    mod = function(a, b) return a % b end,
-    mul = function(a, b) return a * b end,
-    neq = function(a) return -a end,
-    unm = function(a) return -a end, -- an alias
-    pow = function(a, b) return a ^ b end,
-    sub = function(a, b) return a - b end,
-    truediv = function(a, b) return a / b end,
 
     ----------------------------------------------------------------------------
     -- String operators
     ----------------------------------------------------------------------------
-    concat = function(a, b) return a..b end,
-    len = function(a) return #a end,
-    length = function(a) return #a end, -- an alias
+    concat = function(a, b)
+        return a .. b
+    end,
+    len = function(a)
+        return #a
+    end,
+    length = function(a)
+        return #a
+    end, -- an alias
 
     ----------------------------------------------------------------------------
     -- Logical operators
     ----------------------------------------------------------------------------
-    land = function(a, b) return a and b end,
-    lor = function(a, b) return a or b end,
-    lnot = function(a) return not a end,
-    truth = function(a) return not not a end,
+    land = function(a, b)
+        return a and b
+    end,
+    lor = function(a, b)
+        return a or b
+    end,
+    lnot = function(a)
+        return not a
+    end,
+    truth = function(a)
+        return not not a
+    end
 }
 exports.operator = operator
 methods.operator = operator
@@ -1052,7 +1105,7 @@ setmetatable(exports, {
                 rawset(_G, k, v)
             end
         end
-    end,
+    end
 })
 
-return exports
\ No newline at end of file
+return exports
diff --git a/assets/scripts/status_effects/block.lua b/assets/scripts/status_effects/block.lua
index 3d9e1e9..d77ef71 100644
--- a/assets/scripts/status_effects/block.lua
+++ b/assets/scripts/status_effects/block.lua
@@ -19,4 +19,4 @@ register_status_effect("BLOCK", {
             return ctx.damage
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/status_effects/burn.lua b/assets/scripts/status_effects/burn.lua
index 896a37b..b79f535 100644
--- a/assets/scripts/status_effects/burn.lua
+++ b/assets/scripts/status_effects/burn.lua
@@ -15,4 +15,4 @@ register_status_effect("BURN", {
             return nil
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/status_effects/fear.lua b/assets/scripts/status_effects/fear.lua
index 7820968..737831d 100644
--- a/assets/scripts/status_effects/fear.lua
+++ b/assets/scripts/status_effects/fear.lua
@@ -14,4 +14,4 @@ register_status_effect("FEAR", {
             return true
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/status_effects/strength.lua b/assets/scripts/status_effects/strength.lua
index 94142eb..89792cf 100644
--- a/assets/scripts/status_effects/strength.lua
+++ b/assets/scripts/status_effects/strength.lua
@@ -17,4 +17,4 @@ register_status_effect("STRENGTH", {
             return ctx.damage
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/status_effects/vulnerable.lua b/assets/scripts/status_effects/vulnerable.lua
index c4795cd..5666abb 100644
--- a/assets/scripts/status_effects/vulnerable.lua
+++ b/assets/scripts/status_effects/vulnerable.lua
@@ -17,4 +17,4 @@ register_status_effect("VULNERABLE", {
             return ctx.damage
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/status_effects/weaken.lua b/assets/scripts/status_effects/weaken.lua
index e362692..97fe653 100644
--- a/assets/scripts/status_effects/weaken.lua
+++ b/assets/scripts/status_effects/weaken.lua
@@ -17,4 +17,4 @@ register_status_effect("WEAKEN", {
             return ctx.damage
         end
     }
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/story_teller/stage_0.lua b/assets/scripts/story_teller/stage_0.lua
index 483dd60..e43b118 100644
--- a/assets/scripts/story_teller/stage_0.lua
+++ b/assets/scripts/story_teller/stage_0.lua
@@ -35,4 +35,4 @@ After some effort, you manage to open the door and find yourself in a small room
 
         return GAME_STATE_FIGHT
     end
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/story_teller/stage_1_bio_kingdom.lua b/assets/scripts/story_teller/stage_1_bio_kingdom.lua
new file mode 100644
index 0000000..ef77287
--- /dev/null
+++ b/assets/scripts/story_teller/stage_1_bio_kingdom.lua
@@ -0,0 +1,31 @@
+stage_1_bio_kingdom = {
+    fights = { { "RUST_MITE", "RUST_MITE", "RUST_MITE" }, { "SHADOW_ASSASSIN", "SHADOW_ASSASSIN" }, { "SHADOW_ASSASSIN" } }
+}
+
+register_story_teller("STAGE_1", {
+    active = function(ctx)
+        if had_event("BIO_KINGDOM") then
+            return 1
+        end
+        return 0
+    end,
+    decide = function(ctx)
+        local stage = get_stages_cleared()
+
+        if stage == 10 then
+            -- BOSS
+        end
+
+        -- 10% chance to find a random artifact
+        if math.random() < 0.1 then
+            set_event(create_artifact_choice({ random_artifact(get_merchant_gold_max()), random_artifact(get_merchant_gold_max()) }))
+        end
+
+        local choice = stage_1_bio_kingdom.fights[math.random(#stage_1_bio_kingdom.fights)]
+        for _, v in ipairs(choice) do
+            add_actor_by_enemy(v)
+        end
+
+        return GAME_STATE_FIGHT
+    end
+})
diff --git a/assets/scripts/story_teller/stage_1.lua b/assets/scripts/story_teller/stage_1_the_core.lua
similarity index 70%
rename from assets/scripts/story_teller/stage_1.lua
rename to assets/scripts/story_teller/stage_1_the_core.lua
index 09d300e..920c68e 100644
--- a/assets/scripts/story_teller/stage_1.lua
+++ b/assets/scripts/story_teller/stage_1_the_core.lua
@@ -1,8 +1,8 @@
-stage_1 = { fights = { { "RUST_MITE", "RUST_MITE", "RUST_MITE" }, { "SHADOW_ASSASSIN", "SHADOW_ASSASSIN" }, { "SHADOW_ASSASSIN" } } }
+stage_1_the_core = { fights = { { "RUST_MITE", "RUST_MITE", "RUST_MITE" }, { "CLEAN_BOT", "CLEAN_BOT" } } }
 
 register_story_teller("STAGE_1", {
     active = function(ctx)
-        if had_events_any(stage_1_init_events) then
+        if had_event("THE_CORE") then
             return 1
         end
         return 0
@@ -19,11 +19,11 @@ register_story_teller("STAGE_1", {
             set_event(create_artifact_choice({ random_artifact(get_merchant_gold_max()), random_artifact(get_merchant_gold_max()) }))
         end
 
-        local choice = stage_1.fights[math.random(#stage_2.fights)]
+        local choice = stage_1_the_core.fights[math.random(#stage_1_the_core.fights)]
         for _, v in ipairs(choice) do
             add_actor_by_enemy(v)
         end
 
         return GAME_STATE_FIGHT
     end
-})
\ No newline at end of file
+})
diff --git a/assets/scripts/story_teller/stage_1_the_wasteland.lua b/assets/scripts/story_teller/stage_1_the_wasteland.lua
new file mode 100644
index 0000000..f8e139a
--- /dev/null
+++ b/assets/scripts/story_teller/stage_1_the_wasteland.lua
@@ -0,0 +1,31 @@
+stage_1_the_wasteland = {
+    fights = { { "RUST_MITE", "RUST_MITE", "RUST_MITE" }, { "SHADOW_ASSASSIN", "SHADOW_ASSASSIN" }, { "SHADOW_ASSASSIN" } }
+}
+
+register_story_teller("STAGE_1", {
+    active = function(ctx)
+        if had_event("THE_WASTELAND") then
+            return 1
+        end
+        return 0
+    end,
+    decide = function(ctx)
+        local stage = get_stages_cleared()
+
+        if stage == 10 then
+            -- BOSS
+        end
+
+        -- 10% chance to find a random artifact
+        if math.random() < 0.1 then
+            set_event(create_artifact_choice({ random_artifact(get_merchant_gold_max()), random_artifact(get_merchant_gold_max()) }))
+        end
+
+        local choice = stage_1_the_wasteland.fights[math.random(#stage_1_the_wasteland.fights)]
+        for _, v in ipairs(choice) do
+            add_actor_by_enemy(v)
+        end
+
+        return GAME_STATE_FIGHT
+    end
+})
diff --git a/assets/scripts/story_teller/stage_2.lua b/assets/scripts/story_teller/stage_2.lua
index 99ee053..4987939 100644
--- a/assets/scripts/story_teller/stage_2.lua
+++ b/assets/scripts/story_teller/stage_2.lua
@@ -14,4 +14,4 @@ register_story_teller("STAGE_2", {
 
         return GAME_STATE_FIGHT
     end
-})
\ No newline at end of file
+})
diff --git a/format-lua.sh b/format-lua.sh
index e3e5230..5445158 100755
--- a/format-lua.sh
+++ b/format-lua.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-for file in ./assets/scripts/*.lua; do
+for file in ./assets/scripts/**/*.lua; do
   echo "Formatting: $file"
   lua-format "$file" -i
 done
\ No newline at end of file