[General Discussion] Favorite Cell Phone Games

Some of you are probably like, "I have a PSP/GBA/DS; who needs cell phone games?" Still, I think this thread has some merit anyway. Many games have been formatted to work on a cell phone. Some of these are typical classic games like a space shooter or Tetris. However, other games are a little more like modern portable games. What is your favorite? Or, failing at that, what have you played on a cell phone that you think didn't work too well?

I personally don't have much experience with cell phone games, seeing as how I have a black and white screen with only three games on it. However, of the ones I've played, I like Snake II. It's all the fun of Snake without having to avoid the sides like wildfire.

Jam it back in, in the dark.