Easter egg: In 9-Volt & 18-Volt's microgame, "Game On" (where you have to set up a GameCube) after you perform the required actions, you can tap the "power" button on-screen to turn the GameCube on and off. This does not effect your score, however.
Easter egg: In Ashley's microgame, "Don't Blow It," after you light all the candles, you can blow them out by blowing into the microphone. This does not affect your score, however.