I really like the idea. Unfortunately, physics/collision is not great. You don't really need any shapes other than the small blue one and the purple one. You can just stay small and wall jump, or use the purple one when you need to destroy enemies and not jump too high. When you respawn you can air jump, sometimes twice.
Spikes (I assume they were spikes) did not look deadly enough, looked to be part of background/decoration.
Nice job incorporating tutorials into the levels. This game has potential, just need some tweaking to the physics/collision.
Really good job for just 48 hours!