In my opinion, this game has great potential. My two suggestions, if you are still developing this game is:
1. there should be an easy mode and normal mode, normal mode has all the original controls, however easy mode uses just the space bar, or maybe just two buttons to control the player.
2. after the songs finish rendering, the program should remember the map so that you dont have to wait for a long period of time until the game loads the song you wanted to listen to. unless thats not how your code works idk