Thanks for playing!
Originally the brain was meant to grow (and actually did at one point!) however it started acting very buggy so I decided to remove it as I only had a few hours left :( Some way to increase the risk/reward sounds like a great idea though.
As for the gravity, it is intended to be fairly difficult to control (you can switch mid air once before you must touch the ground to get a bit more distance), but I may update it after the jam ends to make it fell a bit snappier.
Thanks for the feedback, it's very helpful!