Marble Run is not only an educational construction simulation but also a free design game that is made of 3D realistic physics game engine. You are permitted to DIY your building of the platforms. You could build runs and mazes for the marble. Keep calm and have fun in Marble Run!

How to play: left mouse button - build, Ctrl - get an overview, Z - move the camera around the surface, Turn the mouse wheel - zoom in, arrow keys - move the camera forward, back, left, and right