I really liked the art on this! It really captured the vibe and brought me back to the early 2000s :)
I also liked that the virus turned into a little Space Invaders minigame, and my only real feedback is that the fight felt pretty slow compared to the hectic file-search. Once you got to the final boss, it felt like there was a lot of waiting for your opportunity to get a hit in, and it would have been nice if the player could be a little bit more of an active participant in the fight
Overall though, well done!