The copy on the back of the Crazy Caverns inlay says:
Ten Crazy Caverns, ten hungry mouths to feed. Line up the Crunchy Cubes and cannon them into the Craving Craw. Watch out for the Crazy Crashers coming to convert your little Cubey Crammer into a Crushed Crisp. It's a cracker!
Crazy Caverns was released in a standard cassette case. On the cover was a single screenshot from the game.