From the box:

"The egg shakes and bursts in laughter in your hands - and you are out of the game.

20 subjects and the wheel of fortune determines the first letter. Start the egg and circle it from one player to another. But you can pass it on only after giving a correct word.

The remaining players continue until there is only one left. A new subject, a new letter, start the egg and continue playing. 5 different variants. Also good for on the road."

Muna is Finnish and Ägget Swedish for "The Egg". The game is basically board and timer driven variant of the "Ship Comes Loaded" game.