Accessible games for iPhone 4S

Does anyone know of any accessible games for my iPhone 4S? I was checking out Words With Friends and am a little confused on some of how the game works. has anyone used this, and if so what do you think of it? If not, what other games which are accessible would you recommend?

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A Fun Game

Words with Friends doesn't work but Hanging with Friends does. It's Hangman with a twist. You are only given 12 letters to choose from to make your word.