Thank you very much! I probably spent far more time bug fixing the game than doing anything else, even though I spent what probably amounted to a couple days on all the music lmao, so I'm glad my polishing efforts are appreciated, as well as that music that I may have spent more time than necessary on.
And as for the coins, I was considering adding a cosmetic shop where you could get different visual variations of the cube friends, but I basically ran out of time while making the boss fight. I even had to trim the fight down to its basic elements and rush an ending to get at least the story done in time for the end of the jam. At the moment, all getting the coins does is it changes the title screen background.