First off, thank you very much for playing. We are aware of this bug, but since we didn't find any immediate easy solution and this was our programmers first game, we decided to keep it in and focus on other things.
As for the music, it will probably be added in an update soon.
Oh, and what you showed in your second video isn't actually the end of the game. I guess it isn't intuitive enough, but you can teleport through the wall on the right, and there are a few more things to power on that side.
Thank you for your comment, and thank you for playing :D