Congrats on the first game!
I think developing a Web Based game is super helpful in a game jam setting.
While I do love the concept of the game and the atmosphere you created there's a lot of things that need some clarity...
Not sure when I'm interacting with something, like I could use the generators to recharge. I want some sound to play when I used it. Maybe even a highlight on the objects?
I would maybe also like a health bar for myself and maybe the enemies.
The regular walk felt very slow and the sprint felt more like speed walking.
Not sure if hiding actually does anything or I'm not patient enough. Seems like the enemies still where just camping my spot lol.
Level design was ok but I was not sure what I was supposed to be doing the whole time... although you did give some clues i.e " I need a pickaxe first" etc.
The use of the flashlight was pretty interesting as I get scared by the random zombie miners(?)
Again sorry to be nitpicky about a lot of things but i do see a lot of potential in this game... I'm sure if you had more time you could really polish this idea and expand on it.