A simple concept that leads to a very smart puzzle game! Like other players, the onboarding was not that easy for me but, when I've started to understand what the game wants me to do, it was a pleasure to solve the challenges.
That's said, I'm blocked at level 8, where I can't undestand why the power comes from 20 to 0 all of a sudden:

Maybe I didn't get the game logic, after all x')
But I really appreciate my time on your entry, very well done!