Congrats for completing the jam! I think the idea of stealing a weapon and possessing it is cool, but I had a lot of difficulty playing the game primarily with the movement.
On the level select screen the player is not shown the doors, and after three presses (ish) of the space bar you can no longer move. It's not immediately clear where to go or what to do - however I assumed green door is the way to go.
When actually moving around the level pressing the space bar caused a lot of fatigue in the wrist, and it was difficult to navigate and move. Parkour was very difficult if not impossible to do, as the player kept rolling off of things and it was hard to land on platforms. It was easier to "fly" across. Also it would be helpful if on death/failure/cheese lava implosion that the momentum of the player is stopped, because it messed with movement for the next attempt.
Got as far as level 2 :)