Congratz on your first gamejam entry!
Fairly simple, but it worked. Controls where explained. Perfect.
Its possible to jump out of the game to the front though, that's the only bug i found.
Aside from that it didn't really fulfill the "teamwork" limitation though, as both characters where able to go all the way up separately.
Art wise it wasnt amazing, but it got its job done.
It was super hard to see where the player was jumping though, maybe if the shadows where being casted straight down, it would've been easier to see.