I completed the game.
The game is cool, controls feel good, the different enemies and waves are fun to deal with and you really get to learn when to use each ammo, and using the super weapon is satisfying. The difficulty of the game is pretty on point which is a big part of why it's fun.
The game lags in the second to last room, when the second wave (3 ships + 1 turret) appears. No biggie.
Nice entry, thanks for sharing.