Not much effort went into this, but it's just Version 1, I'll make another version another day. Here' what the menu buttons do:
Click the cake | Zim will eat the cake
Click the cake a 2nd time | Zim will be done eating the cake
Click & hold down GIR | Gir will appear on the screen and sing the doom song
Click the "DANCE" word | Zim will dance(a bit) and there will be colorful lights
Click the "DANCE word a 2nd time | Zim will stop dancing
Click& hold down Dib's big head | Dib will pop up on 3 sides saying "I AM DIB!"