At its core the game revolves around the “Shift” and the two protagonists “Bismo” and “Plom”. Bound together by accident, they can shift their masses between each other. If one of them shifts, they both change their sizes: the big gets small and the small one gets big! This core mechanic allows for challenging puzzles and funny interaction between the players. Cooperation and communication is the key to succeed. As an example of possible interactions, the characters can push and pull different sized crates or throw each other around.
Shift Happens does have lots of puzzles to solve with plenty of platforming bits inbetween. Its controls are very tight and reactive and there’s a lot of challenging levels that take fast reactions and concentration. Players always need to work and think together to finish the levels. And sometimes you may throw your partner “accidently” in a large tar pit to get the coins, the characters lose on death. With this side mechanic, Shift Happens also provides a small competition.