the progression was great, the bullet patterns especially well done. they didn't feel overwhelming and impossible to dodge to make me throw up my hands and say screw it, but just difficult enough to make me concentrate. def some cuphead flashbacks for me with this one.
the virus mechanic was unique, i really liked how there was a sense of dread that the viruses would screw you over time. that's a pretty psychologically horrifying game concept, that you can't go back. i really admire game mechanics that have that kind of cerebral component. however, i think it is a mechanic that would maybe work better thematically in a game that isn't as cartoonish, unless the clashing of tones between the "game" and the "computer going haywire" stuff is aesthetically accentuated, if that makes sense. the cartoon fish/underwater stuff being hand drawn works on it's own, but i think the "critical error" message windows would have worked better if they were not hand drawn and looked like regular popup error messages. more "3rd wall breaking". that's all just a matter of taste though. and some of the sound effects were too loud for me.
very impressed with what you pulled off.