Let me state for the record that I am a Tetris Addict. I'm not a gamer, I don't do Wii or Playstation or MMORPGs or any of that. But I love Tetris. It's a simple, conceptual puzzle that keeps my mind agile and is never the same twice. When my first GameBoy was stolen from me, I had to get a GameBoy Advance. I played it into the ground, and when it finally gave up the ghost, I started looking for replacements here on Amazon.
The first one I got was "Color Screen Tetris," which was a very satisfactory game UNTIL one of the little blocks on the bottom of the screen burned out ... and then another. And ALSO, Color Screen Tetris sucks down batteries like there's no tomorrow.
Next it was the "Radica Handheld Game Tetris." What a piece of junk. I tossed it in a matter of days, and you can read my review to see why, if you like. DON'T waste your time and money on it.
Finally I settled on THIS game: Radica's "Big Screen Tetris." I'm getting ready to purchase another one for the third of fourth time. Don't get me wrong, it's not poorly made, I just play it so much that eventually one of the buttons wears out. The battery life is great. You can use it in a dark room thanks to the green light that will illuminate the screen, but it's better if you just find a good overhead light to play it under. As a Tetris junkie, I'm happiest with this model.