Algodoo

This is a litle simple mouse folowing machine, if it's inestable, select all the circle and put airFrictionMult more big.

Explain(to people's not know script ):
Scene.my.APos, Scene.my.BPos are the force, it have a center circle, it's the reference position, the propulsors("X, Y") are the working center on mouse, and a laser, code:onLaserHit=(e)=>{Scene.my.APos=app.mousepos(0) - (readable(e.geom)).pos(0);
Scene.my.BPos=app.mousepos(1) - (readable(e.geom)).pos(1)
}

You can use it just comment if you like it or not