A cool homebrew top-down puzzle/platformer. Play as an Opa-Opa wannabe and wander around little labyrinth planets, picking up keys and avoiding water streams. The graphics look very distinctive, as the planets are spherical, and drawn with a trippy pseudo-3D effect.
Ambitious and absolutely gorgeous old-school RPG made by a group of regulars of the old Eidolon's Inn forums. Not only it was released as actual cartridges, it included a CD with an enhanced soundtrack to be streamed from the Mega CD, if you have one. Later ported to other platforms with HD visuals.