Huh this one was pretty fun! I really like the mechanics and could easily see you building on them for deeper more engaging play.
A little more feedback on opening the doors would be nice, audio or screen shake perhaps, I sort of accidently realized that was how you progress. It was pretty tough too, I think both the enemies and you could stand to be a bit slower.
But I really liked this! Great music, atmosphere, mechanics, and adherence to the theme. Bravo!