The player's ball needs to roll on its side along two rails which are aligned vertically one above the other. Each level requires the player to complete physical challenges, which often have more than one puzzle to solve. On occasion, the player has to push other balls down holes or onto rails to continue rolling along the path. As the player navigates the ball along a path each become more difficult than the last. Checkpoints are scattered evenly across levels so that if a player falls off the course they only have to restart the game from the last checkpoint reached. If the ball rolls into them they provide either an extra ball or extra points.
A paper ball can be blown into the air by ventilators and can roll up steep hills easily. Its surface is not smooth, unlike the wooden and stone balls, and so its movement is slightly variable. Furthermore, rolling a stone ball through a bridge made of planks will make the bridge collapse. The stone ball is extremely heavy, and can be accidentally rolled off an edge very easily, but this ball can easily push down boxes and bridges. The player initially launches into and leaves all levels with a wooden ball. The wooden ball is very stable and can be used for several puzzles in the game. It can be transformed into a wood, stone, or paper ball. In the game, the player can change the ball's material with special transformers throughout the game's 13 levels (12 levels originally another downloadable level, level 13 "Speed", is available on the developer's homepage).
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