And Yet It Moves In Between is a story driven, puzzle platformer currently developed for Mac, Windows and Linux. Unfortunately the developers used ZIP <Morbo>THISDOESNOTRETAINPERMISSIONS!</Morbo> so you will need to chmod the executable. That said, check with the judge.
InBetween puts the player into different emotional states of self-awareness combining interactive cutscenes with compelling gameplay. In Between is a near-death experience closer than ever in games before.
Grab the demo from their IndieDB page.
The game is based around the five stages of grief, the emotional stages everyone experiences when facing an decisive turning point in life. Think of the game as a near death experience with compelling game mechanics and interactive cutscenes. It is our attempt to integrate a sensitive topic, challenging gameplay and an emotional story into the genre of 2D platform games.