Something about the controls keeps tripping me up... I can't tell exactly what it is, I think if I'm strafing and shoot, then the angle it fires at is wrong? It's also confusing when the balls behind you, I think it'd be best if the ball was strongly biased to stay in your view and avoid going behind and around you. I felt like I wanted to be moving and shooting at the same time, but these things made that very ineffective. Something about the timing... idk I just kept missing it even though I swear the indicator was green. Maybe I'm too slow.
Anyways, awesome game piggy, it seems like it'd be a lot of fun, but something or another stopped me from getting into a flow. I enjoyed the first bit though, and appreciate how you give us a few waves to get familiar with controls before introducing projectile enemies (teeth?).