In this adventure, Mikey must travel through the Fratellis’ hideout and many subterranean caverns to rescue his Goonie pals and a mermaid. How Mikey met a mermaid is deemed unimportant. The game plays in two distinctly different styles. The first is a mostly open-world platformer where the player can pick many paths to explore as they see fit. Exploration is rewarded with power-ups and extra lives.