Hi Alex,
Thanks for the kind words! Glad you like it! Indeed the game is a prototype, there are still quite a few bugs and extra polishing needed and we're actively working on it (we post some updates there from time to time: https://twitter.com/remwhat). A lot has been improved already, and we hope to release the final version soon-ish. The music was made by 0xA (old website: https://archive.bleu255.com/0xA/ new website to be online later this year) and we will make the Famitracker file available.