Yay I beat it
Quite easy after you learn the tricks of avoiding. Three bosses and the last boss is a bit tricky. Just stay in the upper area and you will do fine. If you shoot the big ass missiles that it launches then they blow up killing all the normal units around (quite handy since you cant really hit them). I cant wait for the next game (I wont ruin anything) and I hope it will have more bosses, different weapons, new enemies and a pause button cause every game needs a pause button. Congrats on making this fine game and getting it on the front page.