*Jump, Jump, Jum- FUCK back to the bottom.*
Okay so this is very interesting. I really love the idea of a Jump King / Splat metroidvainia. Though without mouse control and only on keyboard this was too frustrating to actually play. Watching someone playing it is fairly funny, however.
I did try it with controller, but in both forms I kept running into a frustrating bug that led to my character being forever stuck in a rolling orb form.