My 7 year old niece use to play Pac-Man, dig dug, Bubble Bobble, Super Mario Bros, Duck Hunt, etc. These are the most favorite games played by her ever since my sister started buying the games from instant-gaming along with CD keys, that too in the best deal price. You can also find a variety of Retro games on sites like Instant-gaming, Cd keys etc..

Yeah!! I Agree with Acris, you need to follow the steps.
Add Cyclone CPU for arm
Add Menu F12 to L2 joypad
Few Fix keyboard