Thank you so much for check out the game!
That is odd about the shop bug. I was having some issues with the sfx audio on attacks and gravedigging freezing the game, so I had to remove them entirely to get the web build to work in time for the jam, so if I had to guess it's a weird issue with the audio that plays.
I do want to continue this project at somepoint, but I'd likely restart to get rid of all the bad game jam code.