 More mechanical features are also available, such as connecting objects together with string, using bolts to spin objects, or using various kinds of triggers.Rocket motors can be attached to objects to propel them across a level.After creating custom objects, the player may save their creation to a library for later use, and share their object by placing it inside a prize bubble in their level, so that other players who play the level can collect it and may use it in their own levels.