For IF Comp 2015, I offered as a prize to contribute a piece set in the same universe as the author’s game. Steph Cherrywell chose this prize for Brain Guzzlers from Beyond!, and the result is The Mary Jane of Tomorrow, a not-too-difficult parser puzzle game set a few months after the events of Brain Guzzlers. (Estimated play time roughly 45 minutes, give or take.)
Steph decided she wanted to share the game, so it is now available — and she even drew some cover art for it, which was above and beyond. The Mary Jane of Tomorrow is on IFDB, and you can also read about the creation process if you are curious (some spoilers after the fold).