One of the combo sounds didn't seem to load properly. It can't be my problem since i doublechecked that the directories and the files exist and they all do.
I tried a couple times through the playdate website and got the same error each time. Maybe it's an issue with their system. Seems like the kind of thing that might happen with case-sensitivity or special characters in the filename... I was able to load the game using the simulator's "upload to device" feature, beautiful game :)