There is an interesting glitch when you jump on top of a zombie in one of those small hallways, and then you crouch and jump you are able to glitch through the walls.
Nice game, endurance mode is too easy. I had all their troops pushed back into their base and my troops kept bombarding their wall. You should add a time to beat on it or make it WAY harder. Still a good game! 5/5
To make this more fun to play, yet some what original is by adding more levels, stick men(or animals) that you can grab or have to avoided, add more obstacles(walls, keys, doors, etc.), a funny story, and then add cutscenes(short movies inside the game). Add music, and then a mute button. Fix up the menu. Find a way to stop people from cheating(people can right click and skip over walls and obstacles), try by saying that if someone right clicks say "game over, or that isn't allowed" Hope that helps! Good Luck!