Hidden animations
Move the pointer off-screen in Tee-Off, then charge to full power.
Smoocher invincibility
Stand at the edge of the screen, smooch in the opposite direction, and walk off the screen while this is being done. If done correctly you will reappear on the other side of the screen and catch your own smooch. The invincibility will only last a short amount of time.
Play Tee-Off
Press any letter at the main menu. A sound will confirm correct code entry.