The video above shows what you do in the mode, which is collecting coin, jumping over obstacles, running through obstacles like a freaking maniac, and, of course, trying to beat your own high score.

Here’s some info on the game as given by the devs:

RunSanity is a full-featured game with huge replay value, offering five different improvable characters playable with their own features, 20+ levels, 3 game modes, crazy achievements, tons of power-ups and funny outfits! RunSanity is a unique mobile experience thanks to the Challenge Mode, which allows you to take on your friends not only through leaderboards, but also directly and instantly through your favorite social network.