Snot and Crap

Snot and Crap is a 1-2 player (co-op) game developed by Cyber Systems using the Shoot 'em Up Construction Kit. While you do have to climb ladders, it is not considered a platformer due to the nature of SEUCK games, it's basically a vertically scrolling shooter in which you have to move in front of the ladders in order to advance up the screen.