In Kid Klown in Crazy Chase, you run diagonally down the screen from the upper left to bottom right corner. There is no moving backwards, only left, right and forward. Along with movement, you can jump and slow or speed up Kid Klown. The goal is to get to the end of the level while avoiding obstacles in your way. Additionally, you must do so before the fuse, which runs along your path, gets to the bomb.
You can customize the controls through the "Options" menu, but there's not really a need to. The defaults should be fine, but if you hate them, feel free to try the other scheme.