This is the original Super Mario Land for the Game Boy, a portable classic where Mario rescues Princess Daisy from Tatanga in Sarasaland. It's absolutely worth playing to see Mario's first handheld adventure, though its small screen and unique physics feel distinct from the console games.
The gameplay requires fast reflexes for its short, challenging levels. A key surprise is the shift to vehicle sections, like piloting a submarine or an airplane, which breaks up the standard platforming. Give it a shot for a piece of history.
