Co-Efficient is a co-op platformer game that I developed with a small group of students for a class over the course of 8 weeks. The co-op works using only one keyboard and mouse that the two players share.

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In the game you play as an elf and a wizard trying to reach each other in each level. Each character has distinct abilities that they use in tandem with each other to solve the puzzles. Coco (the elf) has the ability to shoot arrows and can jump higher than Effie (the wizard). Effie can invert her gravity, allowing her to walk on walls. She is also shorter than Coco, making it possible for her to fit into areas that Coco cannot.

When a puzzle is solved, the players get stars based on how many arrows they shot, how many gravity inversions they used, and whether or not they collected the star in the level. This incentivizes the players to solve the puzzle in the most efficient way possible. 

Check out the game here: https://samthesloth.itch.io/co-efficient