First tip for game jams: Always try to upload your game as a WebGL build. Most developers and players won't bother downloading the games (speaking from personal experience). I didn't have any music or sound effects in the game (even though there's an option for that?), but I don't want to rule out the possibility that the problem is on my end. I find it a bit clunky, and even in full-screen mode, it doesn't look very pleasant. The graphics, though, are really cool and fit the game well!
I would have liked a short tutorial or a better explanation of the controls!.