According to the site hosting The Great Gatsby, an NES-like side-scrolling adventure, its lifted from an unreleased cartridge a port of "Doki Doki Toshokan: Gatsby no Monogatari". Sure, we'll play along! There's a great scan of the game's manual and a long-lost ad for the Nintendo Entertainment System-era classic.
Try your hand at The Great Gatsby, a rare literary classic turned old-school video game adventure.
Great Gatsby Game [Official Site]