A cool and simple concept, executed well (it reminded me of the Gravity Suit on Subway Surfers!). For a 10-hour jam, it's impressive! hahah
My feedback is about the acceleration and velocity of the gravity. It feels they are slow to change directions (maybe they are subtracting until 0 again) and really fast to go to max speed - so it's hard to avoid obstacles using the gravity change, but it's easy to keep going into spikes at top and bottom. It's hard to polish, but you can get something of it!