Developer Flippfly is still hard at work with the indie game Race the Sun , and progress seems to be coming along nicely. The newest self titled "experiment" for the game is a relay mode, which is basically a multiplayer of sorts. After death, you can press the "share" button to initiate a relay through a hyperlink.
You can share this hyperlink with anyone, which offers private play sessions or public sessions (sharing over social media). The "relay" itself differentiates from the core game by allowing players to alternate areas of increasing difficulty, which crescendos into a more intense run for a combined "team" score of up to four players. If you have the beta, you can access this free update now.
If you're interested, the blog post that explains the relay system also a bit of developer insight as to how hard it is to update, develop, and experiment with your game with a two man team.
Race the Sun: Experiments Part 1 [Flippfly]
via destructoid http://www.destructoid.com/indie-game-race-the-sun-gets-a-multiplayer-update-255596.phtml