This is a really fun entry. The concept of "just deleting files", as stupid as it sounds, is pretty enjoyable :). The biggest gripe I have with the game though, is that there is no signalling before attacks happen. Usually when deadly attacks came, that was just the end of me. If I was lucky, I would survive one by chance. Adding some signalling on when they start and during those attacks (e.g. a little indicator of where the explosions hit, a few milliseconds before it happens) would probably give the player some skill-based chance of dodging, making those deaths feel less random.
Good job with the Windows-like interface and the browser :D. Looks really fun. Nice work!