The gameplay is similar to the other Ecco the Dolphin games, but mainly revolves around using these abilities for solving simple puzzles and problems.

A follow-up to this title, called Ecco Jr. and the Great Ocean Treasure Hunt!, was also available on the Sega Pico.

Upon release, GamePro gave the game a rave review, commenting that "all the creatures and background scenery have the same breathtaking visual appeal of the grown-up Ecco adventures".

[4] A reviewer for Next Generation, gave it two out of five stars, commenting that "to Ecco Jr.'s credit, it has some beautiful graphics and simplistic gameplay that'll be an easy play for the youngest of gamers.

However, this game is nothing more than a way for Sega to dig its claws into the impressionable minds of young children and make them believe they need to graduate to the first (and more original) Ecco".