Alex Kidd in Shinobi World (Sega Master System)

After ten thousand years, the once-banished Dark Ninja returns to make another attempt to take over the Miracle World. Someone's definitely got to stop him! Guess who dares to meet the challenge? You! You're Alex Kidd, the prince who knows no fear. A lovely girl has been kidnapped and her life is at risk. And she's your girlfriend from the planet Shinobi! By holding her hostage, the Dark Ninja plans to realize his fiendish scheme. She must be saved before it's too late!