Holy crap! This is your FIRST jam game? Like... you have some experience in the industry, don't you?
The way I see it, you made a problem for yourself now. Because now you gotta go, and make this game into a full release. Oh, you have a job? School? Family? Should have thought about it before making a game in a week that is easily better than 90% games on any steam next fest!
Seriously- this is gold. All works together perfectly. Graphics are great, music and sfx fit perfectly, UI has zero bugs (maybe selecting the carts when starting a new game is a bit clunky, but I'm nitpicking now).
I'm absolutely in love with this game!