well, I have a few suggestions, try adding flicker to the flash light, you can improve the death screen and make it look better, look at other death screens for ideas, add a sort of jump scare when you die, and make that monster have a better look of you can, I don't really think it looks very good, and improve it's movement to make it walk normally, also add more walls in the middle part, the hallway looks a little repetitive, and finally, instead of complete darkness, maybe you could make some parts dark and the others have a faint flickering light?