We're just putting the finishing touches on workshop support and soon you'll be able to create and share levels for Race the Sun. To get the ball rolling Flippfly's own Forest (@ForestSanFillip) is going to be hosting a one hour level building tutorial tomorrow at 2PM EST (7PM GMT) on our Twitch channel: http://www.twitch.tv/flippfly
Tune in and get a jump on building cool stuff for Race the Sun- maybe even be one of the first to have one of your levels featured. Forest will be answering questions and giving a general tutorial on the process so check it out even if you have no idea where to start.
Workshop support will be coming in the next 2 weeks.