Thanks for your dedication to completing the game despite the game breaking bugs !
I'm aware of the collision problems with the monsters. Dumb error, easy to fix, but I didn't notice it early enough du to lack of testing.
The music issue is similar, easy to do, but forget to make it loop in the final hours of the jam.
Its the first time i saw the out of bounds issue though. Your record will probably be helpful to investigate it, thanks for that :) .
With more time to work, a colorswap would be a nice addition indeed (maybe in post jam update).