Backdrop 1: Press "S" to make the apple smaller, and press "B" to make it bigger. Press space to change the backdrop. Touch the red to plays a low note, and touch blue to play a high note. Backdrop 2: When the dog touches the cat, the dog runs away! Backdrop 3: Press a sprite to have them both do a dance. Backdrop 4: The balloon will follow your mouse pointer, but it will not touch it.
