If you wait at the title screen, you can do the following things:

Eraser: Erases any marks and the title. Note: The title comes back.
Green Ball: Leaves green marks anywhere they touch.
Star: Leaves rainbow marks anywhere they touch.
Water Drop: Bounces once then splashes.
Garlic: Feed it to nose and it becomes a giant nose.
Bouncing Noses: They bounce around. Hit them with any item to send them flying. Poking them makes them bounce.
Mini-Noses: Noses half the size of normal noses. They can be squished, leaving puddles on ground.
Giant Nose: Created by garlic. If you stuff green balls or stars in its nostrils, it will shoot them out and fly away.