Neat little game. It took me a while before I realized the virus couldn't hurt me, and the player spawning at the top of the scene seemed a bit weird for me. Overall it was pretty tough to keep up with the spawn rate of the virus, the powerups helped a bit but never quite helped as much as I would've liked. Maybe something like persistent powerups could help? Also small bug: if I was holding space and left I couldn't press up to go diagonal, it worked when going right though for some reason. I think it could be pretty cool with some more expanded features like permanent upgrades / new enemies / stuff like that. Good work!