I really liked the aesthetics of this game. Simple shapes and lines felt very pleasing to the eye and I think sticking with black and white as your colors really helped that. The sounds also fit what I've seeing. I did have to refer to the instructions and keys on the page to remind me of the controls and the goal itself, so I think in future jams you should consider putting those in game (maybe in the pause menu as well as the title screen.) I think it was a wise decision to update it for single player, as a lot of us are participating solo. But I also commend you for going for a local multiplayer mode. That's something I haven't tried before. Bug-wise, the game didn't allow me to click back in the credits section.
Overall this was a really cool entry. You kept it simple and short, which is good for game jams. I still have problems with that myself, but it is something I'm trying to drill in my brain. Keep game jammin'!