Chack'n Pop

Chack'n Pop is considered a predecessor of Bubble Bobble. It is a platform game where a roundish yellow creature, named Chack'n, must fight against Monstas and Mightas in order to reclaim hearts that were stolen during a romantic encounter with Miss Chack'n.

The Monstas themselves hatch from eggs hanging from the ceilings and the Mightas push a rock that is used as the game's timer. The Monsta eggs have three phases: if it's blue, it's completely harmless, if it's yellow it will pop within 10 seconds and if an egg turns red it will pop almost immediately.