Vexed...

http://vexed.sourceforge.net/

For those of you with palm pilots I suggest you check this puzzle game out. I got into months ago and just recently returned to it. I found their official website and downloaded all their level packs for free (as in beer). It starts out pretty easy, but then you get into some real brain twisters. The level pack has some that are so close to impossible it's hair-pulling. My friends and I have started helping/competeing with each other. The game is strange, in that you can spend hours on one puzzle, pick it up the next day and finish like it was nothing. It's all about how you look and understand the problem.

The controls are simple, move the blocks and try to match up like ones to have them disappear. But gravity takes effect and other blocks get in your way. You really should try it out.

Enjoy! ;)