It's one hell of a good online game, and it was created at absolutely no cost (except about $12 in lime ade).
The full heart-warming story can be found here
, but basically, a kid called Ben who has Leukemia who's one wish was to make a computer game about beating cancer. LEC technical Director, Eric Johnston (who worked on Indie and the Fate of Atlantis and our own SOMI) got permission for him and ben to work after hours in a studio and create the game.
The 4th beta version can be found here
and is actually pretty entertaining for a while. You an even change the look of the charcters and so on. So go ahead and have fun, and it's all for a good, heartwarming cause (despite you not donating any money and the game being free, but hey, you can donate if you want.