Controls; use "A" to move to the left and "D" to move right. "W" allows you to jump not once but twice, jumping will also stop any momentum you may have built up. Space will allow you to drop a bone which is used to fix gears. The left mouse button will pick up bones and activate levers while the right mouse button will activate the grapple and attach to the wall the mouse is pointing to if the wall is in range.

More information