I bought one of those handhelds similar to that, ZH something or other that has 12 games that are mostly unlicensed ports of some popular cell phone games. It has some like Angry Birds & Plants vs Zombies, and others like Tetris, Pac-Man, & Super Mario Bros (dubbed Risk King).
Probably the weirdest thing is the selection of background music, a lot of it are total ripoffs of other games. So far I've spotted the game over theme from Contra, the Dig Dug main theme, and the theme from the American TV show Cheers (!).