I'm a sucker for puzzle games. Really like this one. I wish you've added more logic puzzles.
The main issue with the game for me is the sound. The music volume/gain is too high, it clips. I couldn't find an option to reduce the volume so I had to mute the tab.
I wish charging is more visible, maybe just add a HUD when you're charging the battery?
Also, I didn't realize the amount of time we can change to different colors is limited, maybe redesign the health bar to make it more obvious?
Overall, awesome demo and cute lil butts.