Great game, noticed though if you click Next Level too fast repeatedly the level will never start. Tip: If you have an un-placeable piece queued, you can still pick up a piece and hold it in the air until the piece you have queued is dropped, and then place it down on TOP of the new piece. May seem like common sense but could make the difference!
Incredible game. Reminds me of the video online called DIMENSIONS about the 4th dimension, check it out if this interested you.
It helps me to visualize them from the top down rather than the side, in case anyone is having trouble.
Really fun I enjoy it, For those of you worrying about lag, maybe try running it in the older versions of IE, with low qual and IE 6 I seem to get no lag at all. Maybe even play without volume but lol.