As a RoboRally board game fan I always wanted to build an online version of the game, when discovering Meteor a couple of months ago I finally started building it. Meteor makes it so incredibly easy and fast to make stuff that I actually (with some help of others) finished the game. It is free to play and fully open source, please check it out and let me know what you think of it. If you are interested in contributing please let me know 
You can find the game at http://www.roborally.com And check out the code at https://github.com/marcelpanse/roborally.