Very polished for a jam game. I'm just super impressed by this one in general. The gameplay is simple, but fun and replayable. It's spot-on aesthetically too; the art, music, and sounds all work together nicely.
Not sure I've got much feedback for this one; it's top notch, and exceptional for a jam entry. I wouldn't think this one would necessarily need expanding on, but I'd be curious to see what you did with it if you were thinking about expanding anyway. Awesome work!