diff --git a/core/assets/maps/maze.png b/core/assets/maps/maze.png
index 4143027ff7..9b4dbc5aaf 100644
Binary files a/core/assets/maps/maze.png and b/core/assets/maps/maze.png differ
diff --git a/core/src/io/anuke/mindustry/Control.java b/core/src/io/anuke/mindustry/Control.java
index 926e83e78b..8602fe30f7 100644
--- a/core/src/io/anuke/mindustry/Control.java
+++ b/core/src/io/anuke/mindustry/Control.java
@@ -50,7 +50,7 @@ public class Control extends RendererModule{
 	public void init(){
 		Musics.shuffleAll();
 		
-		Entities.initPhysics(0, 0, pixsize, pixsize);
+		Entities.initPhysics();
 		
 		Entities.setCollider(tilesize, (x, y)->{
 			return World.solid(x, y);
diff --git a/core/src/io/anuke/mindustry/GameState.java b/core/src/io/anuke/mindustry/GameState.java
index ae215bb403..fd047ced62 100644
--- a/core/src/io/anuke/mindustry/GameState.java
+++ b/core/src/io/anuke/mindustry/GameState.java
@@ -58,7 +58,7 @@ public class GameState{
 					
 					Enemy enemy = null;
 					
-					if(wave%5 == 0 & pos <= wave/5){
+					if(wave%5 == 0 & pos < wave/5){
 						enemy = new BossEnemy(point);
 					}else if(wave > 3 && pos < amount/2){
 						enemy = new FastEnemy(point);
diff --git a/core/src/io/anuke/mindustry/World.java b/core/src/io/anuke/mindustry/World.java
index efe9626ace..4ea2f91c40 100644
--- a/core/src/io/anuke/mindustry/World.java
+++ b/core/src/io/anuke/mindustry/World.java
@@ -59,6 +59,8 @@ public class World{
 			}
 		}
 		
+		Entities.resizeTree(0, 0, pixsize, pixsize);
+		
 		Generator.generate(id);
 		
 		Pathfind.reset();