Man this game could be so cool if you fleshed it out! You did this all in 3 days, imagine if you had a whole more week! I could totally see the level being some kind of living creature and always trying to slowly crush the player. In this version though I wish the level had some colors or some kind of indicator/arrow that let you know which direction the walls/ceiling was going to come crush you in. I really liked how the camera zoomed out when the boulder came rolling down as well.
Would love to have some more parkour moves as well, like a slide and a wall slide, roll, etc... Really cool concept! Kind of misses the rejuvenation part of the jam but still fun game!