Uno - Small World is a Game Boy adaptation of the popular card game Uno. The 'Small World' subtitle might indicate a compact version adapted to the Game Boy's screen and controls.  It features the core card-matching gameplay of Uno but with adjustments for the platform.  Additional details on the game's developer or publisher are currently unavailable.

Uno - Small World (Japan)

Umi no Nushi Tsuri 2 (Japan)