After watching season 3 premiere one thing came into my mind. This is that thing.
It's a silly mini-game based on Super Derpy engine. Unfortunately, due to limitations of used library, it works currently only on GNU/Linux.
Don't worry, development of this game took only one day, Super Derpy is not forgotten! :) This game also served as technological experiment for future development of Super Derpy: Muffin Attack. Results are quite interesting, but I'll keep them secret for now to not spoil anything.
Using GNU/Linux? Grab your sources here!