I'm very confused, I have so many questions. Why can the enemies seemingly shoot further than me? Why am I randomly taking damage out of nowhere? Why... am I taking damage at all and why are there health pickups, I thought the player couldn't die?
Also took me a while to figure out what the room numbers meant (which may have had to do with the fact that I skipped the intro by accident, because pressing enter didn't work at first, though I suspect that might be a web player issue). Also, the movement speed is definitely too slow :/
It's definitely the kind of game that benefits heavily from more time, some sparkles here, some tuning there, and it could be fun. Which I'm sure you wanted to add but ran out of time because everything takes 50 times longer than you'd expect :)