Two Kids Stacked On Top of Each Other In A Trench Coat Pretending To Be An Adult

What is our game? A two-player cooperative puzzle-platformer game. Each player controls a kid and both players can stack on top of each other and disguise themselves as an adult, effectively combining into a single character. When disguised/combined, one player controls movement and the other controls everything else. Each of the two kids has their own unique skill set and the disguised form differs depending on which player is stacked on top or bottom. Each character form/variation may react differently to different obstacles, so changing between them will be necessary for completing levels. ...