Thank you very much for playing and help to test the game! I'll definitely look into the bugs and make fixes in updated versions.
For the music: https://chranesylk.bandcamp.co...
The above is the link to the Bandcamp album page, the two songs in the games are there for download. The album is free for now, please feel free to use the music in your videos. (The cube level's sound is generative so I do not have a track for now. If you like the sounds, I can make a recording of the soundscape and send it to you.)
I am glad you enjoy the experience. Also thank you very much for featuring my game on the list!