I can see the amount of efforts you put into the art (3d modeling, texturing, post processing), well done on that. I also liked the sounds.
On the downside, I will say that the game runs very slow on my old laptop, the User Interface is not deserving well the game (for example: add a background image, game logo on the start screen), I managed to fall off the level infinitely (there are some gaps at some walls) and I didn't find any kind of goal / hook to keep me playing over and over.
I think for a gamejam, you wanted to do something too big and didn't have time to finish it, but you could use what you made as a base to continue and build a great game on top of it!