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Use the hammer or the wrench to connect planks, wheels and other objects together. Use the control panel to control your creations, be it a monster truck, a mechanical rifle or anything YOU can imagine.
Creativity is essential in the gameplay Apparatus. If you don't have the patience to figure out the challenge levels, why not just play around in the physics sandbox and build whatever comes to mind.
Upload and share your levels in the community section or download and comment on other players' levels.