Pretty neat demo! I absolutely loved the designs of the three magical girls. Switching between them was fun, although I feel like Pearl Gold didn't really get much use other than opening doors.
Jumping was a bit hard to control due to the wall jump/cling activating even without pressing any directional inputs, as long as you were facing the wall, and also due to how far each tap of left/right sent you.
The boss was a simple but effective showcase of the character switching system. I had some trouble until I realized he only dealt damage while passing through the center of the room, so I could always just stay behind his head and never get hit. Getting reset all the way to the beginning on death was still a bit annoying, though.
Regardless, not a bad prototype at all!