Many thanks for your review and for playing our game :) We love to hear that you liked the art, the idea and the music :D
The art and idea were made by us, but the music wasn't. It is by Alexandr Zhelanov. So please feel free to check out his page on opengameart.org.
Furthermore we plan to upload a new version as soon as it is allowed to do this according to the GMTK-Gamejam rules :)
There will be a lot of bugfixes we already implemented (the music bug you mentioned is included).
AND: We also plan to include a small story update to the game! :)
So please feel free to play it again, when we release the new version. We really would appreciate that :)