Use your mouse to draw shapes by holding down the left button. To make a circle, click any point and hold the button until the circle is the desired size. A + Left-click = Erase object Spacebar = Reset level S + Left-click = Draw pin D + Left-click = Draw hinge After drawing a pin or hinge, draw over it the second object you would like to connect. Use physics to collect all the flags in each level by drawing shapes to push, support, and guide the red ball (or square) to the flag. Take gravity, friction, and inertia into account! You cannot draw inside other objects.