MonMon is quite impressive. I wouldn't be surprised if it won this jam. The art is really good, though the gameplay feels a bit clunky. Couldn't finish the final boss fight, cause I didn't know if I was damaging her or how much life I had. Also, the only power I could use for that fight was the moon beam. My sword and dash kinda disappeared, but I still had the double jump. With a little polish, I feel this could be a great game.
Here's my entry if you'd like to play it https://itch.io/jam/game-off-2020/rate/838214. It's a 2d shooting game about a ghostbuster on the Moon.