diff --git a/control.lua b/control.lua
index f9aab3d6..58f57162 100644
--- a/control.lua
+++ b/control.lua
@@ -77,6 +77,7 @@ require "modules.autostash"
 --require "maps.territorial_control"
 --require "maps.cave_choppy.cave_miner"
 --require "maps.wave_of_death.WoD"
+--require "maps.pitch_black.main"
 --require "maps.planet_prison"
 --require "maps.stone_maze.main"
 --require "maps.choppy"
diff --git a/maps/pitch_black/difficulty.lua b/maps/pitch_black/difficulty.lua
index bde35930..081455ad 100644
--- a/maps/pitch_black/difficulty.lua
+++ b/maps/pitch_black/difficulty.lua
@@ -2,6 +2,23 @@ local Public = {}
 
 local math_abs = math.abs
 
+local score_values = {
+	["small-spitter"] = 1,
+	["small-biter"] = 1,
+	["medium-spitter"] = 3,
+	["medium-biter"] = 3,
+	["big-spitter"] = 5,
+	["big-biter"] = 5,
+	["behemoth-spitter"] = 10,
+	["behemoth-biter"] = 10,
+	["small-worm-turret"] = 4,
+	["medium-worm-turret"] = 6,
+	["big-worm-turret"] = 8,
+	["behemoth-worm-turret"] = 10,
+	["biter-spawner"] = 16,
+	["spitter-spawner"] = 16
+}
+
 function Public.set_daytime_difficulty(surface, tick)
 	local daytime = surface.daytime
 	if daytime < 0.30 then
@@ -17,10 +34,16 @@ function Public.set_biter_difficulty()
 	local daytime_extra_life_modifier = (-0.30 + daytime) * 2
 	if daytime_extra_life_modifier < 0 then daytime_extra_life_modifier = 0 end
 	
-	local extra_lifes = global.map_score * 0.001 * daytime + daytime_extra_life_modifier
+	local extra_lifes = global.map_score * 0.0001 * daytime + daytime_extra_life_modifier
 	global.biter_reanimator.forces[2] = extra_lifes
 end
 
+function Public.add_score(entity)
+	local value = score_values[entity.name]
+	if not value then return end
+	global.map_score = global.map_score + value
+end
+
 function Public.fleeing_biteys(entity, cause)
 	local surface = entity.surface
 	if not surface.peaceful_mode then return end
diff --git a/maps/pitch_black/gui.lua b/maps/pitch_black/gui.lua
new file mode 100644
index 00000000..97ac4bf1
--- /dev/null
+++ b/maps/pitch_black/gui.lua
@@ -0,0 +1,49 @@
+local Public = {}
+
+local tooltip = "Difficulty increases with higher score."
+
+local function create_score_gui(player)
+	local frame = player.gui.left.add({type = "frame", name = "pitch_black_score", direction = "vertical"})
+	local t = frame.add({type = "table", column_count = 2})
+	
+	frame.tooltip = tooltip
+	t.tooltip = tooltip
+	
+	local element = t.add({type = "label", caption = "Score: "})
+	element.style.font = "heading-1"
+	element.style.font_color = {175, 175, 200}
+	element.style.horizontal_align = "right"
+	element.style.maximal_width = 56
+	element.style.minimal_width = 56
+	element.tooltip = tooltip
+	
+	local element = t.add({type = "label", caption = 0})
+	element.style.font = "heading-1"
+	element.style.font_color = {100, 0, 255}
+	element.style.horizontal_align = "left"
+	element.style.minimal_width = 32
+	element.tooltip = tooltip
+	
+	return frame
+end
+
+local function update_score_gui(player)
+	local frame = player.gui.left.pitch_black_score
+	if not player.gui.left.pitch_black_score then frame = create_score_gui(player) end
+	
+	local frame_table = frame.children[1]
+	
+	local score_value = frame_table.children[2]
+	score_value.caption = global.map_score
+	
+	local score_value = frame_table.children[4]
+	score_value.caption = global.daytime	
+end
+
+function Public.update()
+	for _, player in pairs(game.connected_players) do
+		update_score_gui(player)
+	end
+end
+
+return Public
\ No newline at end of file
diff --git a/maps/pitch_black/main.lua b/maps/pitch_black/main.lua
index e32040c9..8037e9a3 100644
--- a/maps/pitch_black/main.lua
+++ b/maps/pitch_black/main.lua
@@ -1,6 +1,7 @@
 require "modules.biter_reanimator"
 
 local Blood_moon = require "maps.pitch_black.blood_moon"
+local Gui = require "maps.pitch_black.gui"
 local Difficulty = require "maps.pitch_black.difficulty"
 
 local function on_entity_died(event)
@@ -8,6 +9,7 @@ local function on_entity_died(event)
 	if not entity.valid then return end
 	local cause = event.cause	
 	Difficulty.fleeing_biteys(entity, cause)
+	Difficulty.add_score(entity)
 end
 
 local function on_tick()
@@ -18,9 +20,11 @@ local function on_tick()
 	
 	Blood_moon.set_daytime(surface, tick)
 	
-	if tick % 20 ~= 0 then return end
+	if tick % 30 ~= 0 then return end
 	Difficulty.set_daytime_difficulty(surface, tick)
 	Difficulty.set_biter_difficulty()
+	
+	Gui.update()
 end
 
 local function on_init()