diff --git a/map_gen/Diggy/Feature/AlienSpawner.lua b/map_gen/Diggy/Feature/AlienSpawner.lua
index 44fe0c80..148d66e4 100644
--- a/map_gen/Diggy/Feature/AlienSpawner.lua
+++ b/map_gen/Diggy/Feature/AlienSpawner.lua
@@ -43,7 +43,7 @@ function AlienSpawner.register(config)
         local x = event.old_tile.position.x
         local y = event.old_tile.position.y
 
-        if (x^2 + y^2 < alien_minimum_distance_square or config.alien_probability < random()) then
+        if (x * x + y * y < alien_minimum_distance_square or config.alien_probability < random()) then
             return
         end
 
diff --git a/map_gen/Diggy/Feature/DiggyCaveCollapse.lua b/map_gen/Diggy/Feature/DiggyCaveCollapse.lua
index 6ad109b7..fc757537 100644
--- a/map_gen/Diggy/Feature/DiggyCaveCollapse.lua
+++ b/map_gen/Diggy/Feature/DiggyCaveCollapse.lua
@@ -144,7 +144,7 @@ local function spawn_cracking_sound_text(surface, position)
 
     local color = {
         r = 1,
-        g = random(1, 100) / 100,
+        g = random(1, 100) * 0.01,
         b = 0
     }
 
@@ -157,7 +157,7 @@ local function spawn_cracking_sound_text(surface, position)
             name = 'flying-text',
             color = color,
             text = char,
-            position = {x = position.x + x_offset, y = position.y - ((i + 1) % 2) / 4}
+            position = {x = position.x + x_offset, y = position.y - ((i + 1) % 2) * 0.25}
         }.active = true
     end
 end
@@ -416,8 +416,8 @@ end
     @return number sum of old fraction + new fraction
 ]]
 local function add_fraction(stress_map, x, y, fraction)
-    x = 2 * floor(x / 2)
-    y = 2 * floor(y / 2)
+    x = 2 * floor(x * 0.5)
+    y = 2 * floor(y * 0.5)
 
     local x_t = stress_map[x]
     if not x_t then
@@ -519,7 +519,7 @@ function mask_init(config)
     disc_weight = config.mask_relative_ring_weights[2]
     center_weight = config.mask_relative_ring_weights[3]
 
-    radius = floor(n / 2)
+    radius = floor(n * 0.5)
 
     radius_sq = (radius + 0.2) * (radius + 0.2)
     center_radius_sq = radius_sq / 9
diff --git a/map_gen/Diggy/Feature/MarketExchange.lua b/map_gen/Diggy/Feature/MarketExchange.lua
index d254d36a..246f1c95 100644
--- a/map_gen/Diggy/Feature/MarketExchange.lua
+++ b/map_gen/Diggy/Feature/MarketExchange.lua
@@ -167,7 +167,7 @@ end
 local function on_research_finished(event)
     local force = game.forces.player
     local current_modifier = mining_efficiency.research_modifier
-    local new_modifier = force.mining_drill_productivity_bonus * config.mining_speed_productivity_multiplier / 2
+    local new_modifier = force.mining_drill_productivity_bonus * config.mining_speed_productivity_multiplier * 0.5
 
     if (current_modifier == new_modifier) then
         -- something else was researched
@@ -236,16 +236,10 @@ local function redraw_heading(data)
     local frame = data.market_list_heading
     Gui.clear(frame)
 
-    local heading_table = frame.add {type = 'table', column_count = 3}
-
-    local label = heading_table.add {type = 'label', name = tag_label_stone, caption = 'Name'}
-    apply_heading_style(label.style, 90)
-
-    local label = heading_table.add {type = 'label', name = tag_label_buff, caption = 'Buff'}
-    apply_heading_style(label.style, 200)
-
-    local label = heading_table.add {type = 'label', name = tag_label_item, caption = 'Item'}
-    apply_heading_style(label.style, 200)
+    local heading_table = frame.add({type = 'table', column_count = 3})
+    apply_heading_style(heading_table.add({type = 'label', name = tag_label_stone, caption = 'Name'}).style, 90)
+    apply_heading_style(heading_table.add({type = 'label', name = tag_label_buff, caption = 'Buff'}).style, 200)
+    apply_heading_style(heading_table.add({type = 'label', name = tag_label_item, caption = 'Item'}).style, 200)
 end
 
 local function redraw_progressbar(data)
@@ -260,8 +254,7 @@ local function redraw_progressbar(data)
     -- calc % of stones sent
     local stone_sent = stone_tracker.stone_sent_to_surface / highest_amount
 
-    local overall_descr = flow.add({type = 'label', name = 'Diggy.MarketExchange.Frame.Progress.Overall', caption = 'Overall progress:'})
-    apply_heading_style(overall_descr.style)
+    apply_heading_style(flow.add({type = 'label', name = 'Diggy.MarketExchange.Frame.Progress.Overall', caption = 'Overall progress:'}).style)
     local overall_progressbar = flow.add({type = 'progressbar', tooltip = stone_sent * 100 .. '% stone sent'})
     overall_progressbar.style.width = 540
     overall_progressbar.value = stone_sent
@@ -276,15 +269,13 @@ local function redraw_progressbar(data)
     local sent = stone_tracker.stone_sent_to_surface - act_stone
     local percentage = sent / range
 
-    local level_descr = flow.add({type = 'label', name = 'Diggy.MarketExchange.Frame.Progress.Level', caption = 'Progress to next level:'})
-    apply_heading_style(level_descr.style)
+    apply_heading_style(flow.add({type = 'label', name = 'Diggy.MarketExchange.Frame.Progress.Level', caption = 'Progress to next level:'}).style)
     local level_progressbar = flow.add({type = 'progressbar', tooltip = percentage * 100 .. '% stone to next level'})
     level_progressbar.style.width = 540
     level_progressbar.value = percentage
 end
 
 local function redraw_table(data)
-
     local market_scroll_pane = data.market_scroll_pane
     Gui.clear(market_scroll_pane)
 
@@ -302,7 +293,6 @@ local function redraw_table(data)
 
     -- create table
     for i = 1, #config.unlockables do
-
         if config.unlockables[i].stone ~= last_stone then
 
             -- get items and buffs for each stone value
@@ -370,7 +360,6 @@ local function redraw_table(data)
     -- print table
     for _, unlockable in pairs(row) do
         local is_unlocked = unlockable[1] <= stone_tracker.stone_sent_to_surface
-
         local list = market_scroll_pane.add {type = 'table', column_count = 3 }
 
         list.style.horizontal_spacing = 16
@@ -447,7 +436,6 @@ local function toggle(event)
     frame = center.add({name = 'Diggy.MarketExchange.Frame', type = 'frame', direction = 'vertical'})
 
     local market_progressbars = frame.add({type = 'flow', direction = 'vertical'})
-
     local market_list_heading = frame.add({type = 'flow', direction = 'horizontal'})
 
     local market_scroll_pane = frame.add({type = 'scroll-pane'})
diff --git a/map_gen/Diggy/Feature/ScatteredResources.lua b/map_gen/Diggy/Feature/ScatteredResources.lua
index 911dbf0a..5c793a0c 100644
--- a/map_gen/Diggy/Feature/ScatteredResources.lua
+++ b/map_gen/Diggy/Feature/ScatteredResources.lua
@@ -4,6 +4,7 @@
 
 -- dependencies
 local Event = require 'utils.event'
+local Global = require 'utils.global'
 local Debug = require 'map_gen.Diggy.Debug'
 local Template = require 'map_gen.Diggy.Template'
 local Perlin = require 'map_gen.shared.perlin_noise'
@@ -15,6 +16,14 @@ local floor = math.floor
 -- this
 local ScatteredResources = {}
 
+local seed
+
+Global.register({
+    seed = seed,
+}, function(tbl)
+    seed = tbl.seed
+end)
+
 local function get_name_by_random(collection)
     local pre_calculated = random()
     local current = 0
@@ -66,7 +75,7 @@ function ScatteredResources.register(config)
     end
 
     local function get_noise(surface, x, y)
-        local seed = surface.map_gen_settings.seed + surface.index + 100
+        seed = seed or surface.map_gen_settings.seed + surface.index + 200
         return Perlin.noise(x * config.noise_variance, y * config.noise_variance, seed)
     end
 
diff --git a/map_gen/Diggy/Feature/SimpleRoomGenerator.lua b/map_gen/Diggy/Feature/SimpleRoomGenerator.lua
index 7f99852f..89c5c1d0 100644
--- a/map_gen/Diggy/Feature/SimpleRoomGenerator.lua
+++ b/map_gen/Diggy/Feature/SimpleRoomGenerator.lua
@@ -6,6 +6,7 @@
 local Template = require 'map_gen.Diggy.Template'
 local Perlin = require 'map_gen.shared.perlin_noise'
 local Event = require 'utils.event'
+local Global = require 'utils.global'
 local Debug = require'map_gen.Diggy.Debug'
 local Task = require 'utils.Task'
 local Token = require 'utils.global_token'
@@ -13,6 +14,14 @@ local Token = require 'utils.global_token'
 -- this
 local SimpleRoomGenerator = {}
 
+local seed
+
+Global.register({
+    seed = seed,
+}, function(tbl)
+    seed = tbl.seed
+end)
+
 local do_spawn_tile = Token.register(function(params)
     Template.insert(params.surface, {params.tile}, {})
 end)
@@ -54,7 +63,7 @@ function SimpleRoomGenerator.register(config)
     local room_noise_minimum_distance_sq = config.room_noise_minimum_distance * config.room_noise_minimum_distance
 
     local function get_noise(surface, x, y)
-        local seed = surface.map_gen_settings.seed + surface.index + 200
+        seed = seed or surface.map_gen_settings.seed + surface.index + 100
         return Perlin.noise(x * config.noise_variance, y * config.noise_variance, seed)
     end
 
@@ -63,7 +72,7 @@ function SimpleRoomGenerator.register(config)
         local x = position.x
         local y = position.y
 
-        local distance_sq = x^2 + y^2
+        local distance_sq = x * x + y * y
 
         if (distance_sq <= room_noise_minimum_distance_sq) then
             return
diff --git a/map_gen/Diggy/Feature/StartingZone.lua b/map_gen/Diggy/Feature/StartingZone.lua
index e3a02f8b..dfafeabb 100644
--- a/map_gen/Diggy/Feature/StartingZone.lua
+++ b/map_gen/Diggy/Feature/StartingZone.lua
@@ -40,9 +40,9 @@ function StartingZone.register(config)
         local tiles = {}
         local rocks = {}
 
-        local dirt_range = floor(starting_zone_size / 2)
+        local dirt_range = floor(starting_zone_size * 0.5)
         local rock_range = starting_zone_size - 2
-        local stress_hack = floor(starting_zone_size / 10)
+        local stress_hack = floor(starting_zone_size * 0.1)
 
         for x = -starting_zone_size, starting_zone_size do
             for y = -starting_zone_size, starting_zone_size do