Good job! Like others have said I really like the artwork!
I may have found a glitch while playing. I ended up touching a small (blue) building when I fell past a ledge. I was further away from the building than normal and pressing the spacebar wouldn't fill the bar. I'm not sure how this works behind the scenes, but I'd imagine I fell out of the building's hit box but the player object couldn't leave "power mode" until the building's bar was full.