Move the mouse around to move the box. If you hold it in the top right corner of the screen, the corners may not line up correctly, this is because the back side of the cube is not rendered according to the lines that connect the front and back together. This should've been on my test account :P
Technically this isn't 3D. There is no way of changing the Z position, it's just a square, with a smaller square, that points towards the center of the screen and moves the distance to it multiplied by 0.1, then all the corners are connected on the squares. It's not 3D but it certainly has the illusion of it being 3D.
