We did at second game jam at the studio i work at this past weekend. Our team won the first one using construct, so of course we harnessed the power of it for the second one.
EDIT: WE WON!
This was the result of 18 hours, 3 people (2 artists and 1 programmer)
Super Commandbros: https://db.tt/xqZY6FG8
2 Player with gamepad/keyboard support