Amazing. It's feels very solid, I would rather another key for recovering the balls. The music is too loud, maybe should be down a little bit. I can imagine for a 2d game working with the perspective has been a hell :D
If I could add something would be to be able to aim instead of shooting straight. But maybe it would add a lot of work for the enemy agent to be competent agains you.
Thanks for the game, really enjoyed.