diff --git a/maps/biter_battles_v2/biter_battles_v2.lua b/maps/biter_battles_v2/biter_battles_v2.lua
index d4f0d738..e023af0b 100644
--- a/maps/biter_battles_v2/biter_battles_v2.lua
+++ b/maps/biter_battles_v2/biter_battles_v2.lua
@@ -1,6 +1,6 @@
 -- Biter Battles v2 -- by MewMew
 
-require "maps.biter_battles_v2.terrain"
+--require "maps.biter_battles_v2.terrain"
 require "maps.biter_battles_v2.mirror_terrain"
 
 local simplex_noise = require 'utils.simplex_noise'
@@ -32,6 +32,7 @@ local function on_player_joined_game(event)
 	--init_surface(event)
 	local player = game.players[event.player_index]
 	player.character.destructible = false
+	player.character.destroy()
 end
 
 event.add(defines.events.on_player_joined_game, on_player_joined_game)
diff --git a/maps/biter_battles_v2/mirror_terrain.lua b/maps/biter_battles_v2/mirror_terrain.lua
index ca1eab63..66f04b86 100644
--- a/maps/biter_battles_v2/mirror_terrain.lua
+++ b/maps/biter_battles_v2/mirror_terrain.lua
@@ -49,7 +49,7 @@ local function get_chunk_position(position)
 end
 
 local function process_entity(surface, entity)
-	local new_pos = {x = entity.position.x * -1, y = entity.position.y * -1}
+	local new_pos = {x = entity.position.x * -1, y = (entity.position.y * -1) - 1}
 	if entity.type == "tree" then
 		local e = surface.create_entity({name = entity.name, position = new_pos, graphics_variation = entity.graphics_variation})
 		--e.graphics_variation = entity.graphics_variation
@@ -84,7 +84,7 @@ local function mirror_chunk(surface, chunk_area, chunk_position)
 		surface.force_generate_chunk_requests()
 	end
 	for _, tile in pairs(surface.find_tiles_filtered({area = chunk_area})) do
-		surface.set_tiles({{name = tile.name, position = {x = tile.position.x * -1, y = tile.position.y * -1}}}, true)
+		surface.set_tiles({{name = tile.name, position = {x = tile.position.x * -1, y = (tile.position.y * -1) - 1}}}, true)
 	end	
 	for _, entity in pairs(surface.find_entities_filtered({area = chunk_area})) do
 		process_entity(surface, entity)
@@ -92,7 +92,7 @@ local function mirror_chunk(surface, chunk_area, chunk_position)
 	for _, decorative in pairs(surface.find_decoratives_filtered{area=chunk_area}) do
 		surface.create_decoratives{
 			check_collision=false,
-			decoratives={{name = decorative.decorative.name, position = {x = decorative.position.x * -1, y = decorative.position.y * -1}, amount = decorative.amount}}
+			decoratives={{name = decorative.decorative.name, position = {x = decorative.position.x * -1, y = (decorative.position.y * -1) - 1}, amount = decorative.amount}}
 		}
 	end		
 end
@@ -103,12 +103,16 @@ local function on_chunk_generated(event)
 	
 	if event.area.left_top.y > 32 or event.area.left_top.x > 32 or event.area.left_top.x < -32 then 
 		for _, e in pairs(surface.find_entities_filtered({area = event.area})) do
-			e.destroy()
+			if e.valid then
+				e.destroy()
+			end
 		end
 	else
 		for _, e in pairs(surface.find_entities_filtered({area = event.area})) do
-			if e.name ~= "player" then
-				e.destroy()
+			if e.valid then
+				if e.name ~= "player" then
+					e.destroy()
+				end
 			end
 		end
 	end
@@ -123,7 +127,7 @@ local function on_chunk_generated(event)
 	global.on_tick_schedule[game.tick + 1][#global.on_tick_schedule[game.tick + 1] + 1] = {
 		func = mirror_chunk,
 		args = {surface, mirror_chunk_area, get_chunk_position({x = x, y = y})}
-	}										
+	}									
 end
 
 event.add(defines.events.on_chunk_generated, on_chunk_generated)
diff --git a/maps/biter_battles_v2/terrain.lua b/maps/biter_battles_v2/terrain.lua
index 980dd816..29828b71 100644
--- a/maps/biter_battles_v2/terrain.lua
+++ b/maps/biter_battles_v2/terrain.lua
@@ -14,6 +14,8 @@ local worms = {
 		[7] = {"behemoth-worm-turret"}
 	}
 
+local spawners = {"biter-spawner", "biter-spawner", "spitter-spawner"}
+	
 local function get_noise(name, pos)	
 	local seed = game.surfaces[1].map_gen_settings.seed
 	local noise_seed_add = 25000
@@ -21,9 +23,9 @@ local function get_noise(name, pos)
 		local noise = {}
 		noise[1] = simplex_noise(pos.x * 0.005, pos.y * 0.005, seed)
 		seed = seed + noise_seed_add
-		noise[2] = simplex_noise(pos.x * 0.01, pos.y * 0.01, seed)
+		noise[2] = simplex_noise(pos.x * 0.05, pos.y * 0.05, seed)
 		seed = seed + noise_seed_add
-		local noise = noise[1] + noise[2] * 0.25
+		local noise = noise[1] + noise[2] * 0.2
 		--noise = noise * 0.5
 		return noise
 	end	
@@ -39,8 +41,8 @@ end
 local function generate_biters(surface, pos, distance_to_center)
 	if distance_to_center < biter_territory_starting_radius then return end
 	
-	if distance_to_center < biter_territory_starting_radius + 64 then
-		if math_random(1,96) == 1 and surface.can_place_entity({name = "behemoth-worm-turret", position = pos}) then
+	if distance_to_center < biter_territory_starting_radius + 32 then
+		if math_random(1, 128) == 1 and surface.can_place_entity({name = "behemoth-worm-turret", position = pos}) then
 			surface.create_entity({name = get_worm(distance_to_center), position = pos})
 		end
 		return
@@ -48,15 +50,15 @@ local function generate_biters(surface, pos, distance_to_center)
 	
 	local noise = get_noise(1, pos)
 	
-	if noise > 0.3 or noise < -0.3 then		
-		if math_random(1,8) == 1 and surface.can_place_entity({name = "rocket-silo", position = pos}) then
-			surface.create_entity({name = "biter-spawner", position = pos})
+	if noise > 0.5 or noise < -0.5 then		
+		if math_random(1,12) == 1 and surface.can_place_entity({name = "rocket-silo", position = pos}) then
+			surface.create_entity({name = spawners[math_random(1,3)], position = pos})
 		end
 		return
 	end
 	
-	if noise < 0.1 or noise > -0.1 then
-		if math_random(1,64) == 1 then
+	if noise > 0.4 or noise < -0.4 then
+		if math_random(1,48) == 1 then
 			if surface.can_place_entity({name = "behemoth-worm-turret", position = pos}) then
 				surface.create_entity({name = get_worm(distance_to_center), position = pos})
 			end
@@ -65,6 +67,34 @@ local function generate_biters(surface, pos, distance_to_center)
 	end
 end
 
+local function generate_horizontal_river(surface, pos, distance_to_center)
+	if pos.y > 32 then return end
+	if pos.y < -32 then return end
+	
+	local noise = get_noise(1, pos)
+	surface.set_tiles({{name = "water", position = pos}})
+end
+
+local function generate_horizontal_river(surface, pos, distance_to_center)
+	--local pos = {x = math.floor(pos.x), y = math.floor(pos.y)}
+	if pos.y < -16 then return end
+	
+	--local noise = get_noise(1, pos)
+	surface.set_tiles({{name = "water", position = pos}})
+end
+
+local function generate_circle_spawn(surface, pos, distance_to_center)
+	--local pos = {x = math.floor(pos.x), y = math.floor(pos.y)}
+	if pos.y > 16 then return end
+	if pos.y < -16 then return end
+	if pos.x > 16 then return end
+	if pos.x < -16 then return end
+	
+	if distance_to_center < 10 then
+		surface.set_tiles({{name = "concrete", position = pos}})
+	end
+end
+
 local function on_chunk_generated(event)
 	if event.area.left_top.y >= 0 then return end
 	local surface = event.surface
@@ -75,11 +105,13 @@ local function on_chunk_generated(event)
 	
 	local left_top_x = event.area.left_top.x
 	local left_top_y = event.area.left_top.y
-	for x = 0.5, 31.5, 1 do
-		for y = 0.5, 31.5, 1 do
+	for x = 0, 31, 1 do
+		for y = 0, 31, 1 do
 			local pos = {x = left_top_x + x, y = left_top_y + y}
 			local distance_to_center = math.sqrt(pos.x ^ 2 + pos.y ^ 2)
-			generate_biters(surface, pos, distance_to_center)
+			generate_horizontal_river(surface, pos)
+			generate_circle_spawn(surface, pos, distance_to_center)
+			generate_biters(surface, pos, distance_to_center)			
 		end
 	end