Moomin no Daibouken is a Japanese Game Boy Color game based on the popular Moomin characters. The game's genre is likely either an adventure or puzzle game, given the Moomin franchise.  It possibly features a narrative following the Moomin family and their friends, set within the recognizable Moomin world.  The game would most likely involve exploration, problem-solving, or perhaps collecting items. Its Japanese-only release limits its accessibility for English-speaking players.

Moomin no Daibouken (Japan)

Monsters, Inc. (USA)