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Ludum Dare 38 (Planet Carbalsnahps 2)
Note: this the physics in this game is broken, but you can try to play anyway.
Controls: click to create a joint and drag between joints to create connections. Press R on joints and connections to remove them. Press S to switch between editor and simulation mode. The point of this game was to have gravity gradually increasing and the structure you built having to stay above a certain point, but that didn't work out.
Source Source as of submission