Just to clear things up, I just thought I should say a few things. In our 3D universe, if we move fast enough in any way, time can move backwards or stop (not sure). Therefore, in a 2D universe, when an object moves very fast, it slows down the constant back or forth movement of that universe. If that 2D object were to reach the speed of light, the universe around it would stop. It would cease it's back or forth motion. Therefore, back and forth is time for the 2D creatures. Let me explain. The 2D universe is always moving back or forth. Since it is 2D, it must be leaving layers behind of whatever size along the way. Therefore, if one were to travel left or right past the speed of light, the universe would cease or reverse its back or forth motion, thereby causing the object and the entire 2D universe to travel back through its "time layers". It is the same concept for us 3Ders, but with a different motion, time. Since time ties into this so well, it must be true! By the way, did anybody ever stop to think that maybe there is no such thing as alternate dimensions?