In the level information screens, if you touch The Coast (kingdom 9) king's big ol'afro hair he'll start dissing and shouting at you.
In the level information screens, if you rub Zorm's bald head, you'll hear it squeak, like when you rub your finger over a very polished surface, and find it squeaky clean.
In the level information screens, if you touch/rub certain female Queen characters' body parts, you'll hear the voice of a perverted old man (probably Zorm himself) whispering "Ii jya nai ka...", which is Japanese for something like "It's OK, don't worry..."
The demolition tool (hammer) can be used to blow up birds which fly about from tree to tree. They quite literally explode and emit different sounds when they are hammer-smashed. The birds' different individual exploding cries feature recordings of some of the core development team's members acting as exploding birds.