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.
About:
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.
Website: inbetween.gentlymad.org
Facebook: gameinbetween