Jack no Daibouken - Daimaou no Gyakushuu (Jack's Great Adventure - The Demon King's Counterattack) is a Game Boy Color adventure game released in Japan. Based on the title, the game appears to be an adventure with a focus on a character named Jack and a conflict involving a Demon King.  The gameplay likely involved exploration, puzzle-solving, and potentially combat elements, though the specific style is difficult to ascertain without more detailed game information. The Japanese-language title indicates a localized release within the Japanese market.

Jack no Daibouken - Daimaou no Gyakushuu (Japan)

Itsudemo Pachinko GB - CR Monster House (Japan)