A few suggestions:
Give the user the option to restart the game or go back to the main menu. Being forced to go back to the menu is a little annoying when I just want to start one of the games over again.
More variety of sounds and/or background music that can be toggled would help a lot. While the apple eating sound in snake is cool and the 'bounce' sound for breakout and pong is classic, a little variety would be entertaining.
Other than that it's pretty fun.
i did consider background music, but it would increase the file size and a smaller arcade style loop would get annoying, and not everybody likes the same kind of music, so i would end up with people voting low simply because they didnt like the music..
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