Elegy for a Dead World is an unusual project from Dejobaan Games, the developer of AaaaaAAaaaAAAaaAAAAaAAAAA!!! for the Awesome and Drunken Robot Pornography.
Players explore a side-scrolling sci-fi world, prompted to respond to it with their own creative prose.
Once you've completed a story, you can upload and share it.
The project was funded by a $72,000 Kickstarter, and was originally expected in March 2015. I guess the extra funds helped Dejobaan get it out the door faster, since you can now grab it for Linux, Mac or PC via Steam.
Grab it for 10% off its $15 ticket price during the launch window.