Minor Bug: In the later stages of the game when the enemies are purple, the purple flying eyeball has smaller blue flying eyeballs around it instead of purple. Then when you kill it, the smaller blue flying eyeballs that were hovering over the bigger one die and turn purple as they fall.
wow, if you lag, the fire rate of the enemies is the same as normal speed, and your hp regen is as slow as the lag. Impossible for lvl 18 which generates so much lag from the lasers....