This is a pretty solid horror shooter and you've done a decent job of merging it into a whole, cohesive experience. As you've commented, this is a game that was cut a little short, but as it stands it's pretty enjoyable and honestly quite a lot of work to assemble together between two people for a jam.
As others have noted, the stylistic cue for the game is Bioshock, but I think that's a good thing - having influential reference points can help players pick up on whether they think they'd like the direction. As it is, having played it, it isn't specifically too indebted to the game at all - if still very inspired!
The gameplay is pretty standard but you've added quite a lot for a jam: dialog menus, pickup ammo, and a health system. I like how you've taken the direction of including some minor puzzles which make the gameplay a bit more nuanced. This could easily be fleshed out into a more full experience.
Constructive criticism for this game would mostly just be me saying, I'd be keen to see more! There's a lot more potential for games like this and some better variety in the levels and weapons, as well as more dynamic monster spawns, and I think you could do everything you can hope for with this.
I did a playthrough below:
Keep it up! This game is a solid foundation for something really good. I think you've done super well :)
- FSV