this is super fun! my only real feedback is that the controls feel pretty weird, and i wish they were all a little more intuitive. It feels off to have buttons so scattered across the left side of the keyboard.
if i had to give an example, it would be:
Arrows - Movement
Z - Jump
X - Dash
C (or maybe holding Z in air?) - Plane
Transformations as ASD maybe?
Also the cave background looks amazing!