The game looks good! You did a great job on the lighting and in general in the 3d style, it felt quite claustophobic and scary! If you could add a little more juice, with particles, camera shake etc. The game could turn out great! Especially you should focus more around the main mechanic which is the jumping in walls! Some particle effects and some adjustments there would make a huge difference!
But you did great for the game jam! Good luck on your next project! ^^ Cheers!