Jet de Go! is a Japanese Game Boy Color game, with the title likely referring to a jet-based vehicle or activity. The gameplay could involve piloting a jet, completing missions, or racing against other jets, though specifics are hard to find.  The game may be a side-scroller or utilize a top-down perspective.  The developer and publisher are currently unknown.

Jet de Go! (Japan)

Jay und die Spielzeugdiebe (Germany)