Nice Beginning
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.