South Park Imaginationland, a physics puzzler developed by RealNetworks, is now on sale for just $2.99. The game launched in July for $9.99 and got some nice response. You play the role of Butters who’s launched into the air and each time he bounces against a wall or the ground he gains imagination powder. With this powder, you can propel yourself into the air with a simple swipe of your finger. The goal of each level is to pick up a number of Rainbows and land on the goal.