Thanks for the feedback :)
Unfortunately I had very little time to work on the game this jam. I was still planning to at least add some bgm/sfx but to make matters worse, my PC started crashing in the last two hours or so before the deadline. The traps were sometimes hard to dodge if you don't know where the boulder is going to come from beforehand. Unfortunately I did not have the time to implement clear signaling, and without it I felt it would mostly feel bad/unfair to the player if they got a real penalty for getting hit. So instead I went with a time penalty, which is only a minor inconvenience and also gets reflected in your end screen.