game to hard
you need to check your game again. when you get to wave 13 where you fight the first battlecruiser it's impossible to kill it. the wave chances. the difilier can only shot once and that's it. then to much mobs are with the cruiser. also you need to slow down the cruiser's attack. it's way to fast. the difilier can't even recharge. i've been trying to beat it but it's IMPOSSIBLE. also you need to increase the energy regen. it's to hard to gain exp and nerf the blue marines. if you take my advise other players should have a much easier time and most importantly much more fun. good job with the game too.