Some things:
1) For me, the music played only on the left side ear.
2) You can push the boxes so close to the wall that you can't access them anymore when you need them. You need to restart the game. I did not come up with a solution quickly to that but you can maybe play around with stuff and do something about it. Maybe a movement ability with what you can move the box when it's as close to the wall as possible.
Other than this, great job. It's pretty good if you did it in two days (written in the game "Infos" when you play it).