An impressive puzzle game for 7 day game jam!
It was a nice combination of physics and puzzle game. Some improvements I would suggest is an option to able/ disable the timer, I think the game has potential without a timer as well (and just a point system would be sufficient). Doing the 'simpler' puzzles before you can continue each time is a little tiring after a few times, for example when you are stuck on the 10th puzzle and have to re-do 1 to 9 each time. Perhaps the timer should restart for each time (give 10 seconds?) and count the seconds that are left each time as the points gained. I enjoyed playing it.