The graphics are your biggest strength. Especially the spinning fans and the bacteriophages I thought looked cool. The gameplay does leave much to be desired though.
I was under the impression at the beginning that you had to shoot the square enemies in the order in which either 0s and 1s appeared, and was disappointed when I learned that was not the case. I feel like that was a missed opportunity.
Furthermore, the fact that no other enemy uses this 0 and 1 system was also a missed opportunity, as it makes your original idea feel disconnected.
There was some weirdness with keybindings, you could not run forwards and jump at the same time, and sometimes switching the gun type didn't work.
Eventually I lost because a spawner coin that spawned bacteriophages spawned so many enemies that my game lagged out to an unplayable level.
I still like the idea and especially the visuals, so thank you for creating!