Your goal in this awesome physics-based tower building game is to build the tallest, largest, and strongest structure possible. Don't let it collapse. Click the LEFT MOUSE BUTTON to add a new pylon, click one bolt, then another to join them together. Try to use triangles - they are the most stable! You can use SHIFT+click to delete pylons, or SPACEBAR to freeze time (if you have a full special meter). Good luck!