Cool game, though health pickups were so overabundant later on that I barely had to dodge, and it would be nice if health regenerated when new waves start. Also the game was really small compared to the screen, which could be because of my monitor, but either way it should fill the screen on higher resolutions. If the game was small for the loops later in the game, potentially having the game zoom out over time could work.
Overall solid and fun, could need rebalancing of the upgrades.