I was also thinking about making a game where life and time are merged when the theme dropped! Bringing that concept to a survivor-like format is a great idea, and the music is super catchy.
Unfortunately, on my PC, the weapon-switching key wasn't working, and having to spam the cursor to use the base weapon got a bit tedious. With slightly fewer screen effects and a bit more difficulty balancing (it's a little too easy right now), this could be a really neat concept.
Great job!