numptyphysics
描述：
用蜡笔利用重力，并着手创建块，坡道，杠杆，皮带轮以及您喜欢的其他任何东西，以使小红色的东西变成黄色的东西。
Numpty Physics is a drawing puzzle game in the spirit (and style?) of Crayon Physics using the same excellent Box2D engine. Note though that I’ve not actually played CP so the experience may be very different. Numpty Physics includes a built-in editor so that you may build (and submit) your own levels.
