That was spooky! I liked the idea of a maze where you can figure out where you've already been thanks to the doors you already opened. Also the creature freaked me out more than once.
Not sure if it's my computer but the camera was pretty laggy on my end, here's an example: https://gyazo.com/60ff7a513346484c1ed38d2d64f749cb
I liked the torch idea and those batteries are real oxygen bubbles. I found them sometimes hard to pick (but maybe because of teh camera thing), maybe you could increase the interaction radius a bit?
great job!