Alex Kidd in Shinobi World is Sega's largely successful attempt to mesh the worlds of two of their flagship Sega Master System titles: Shinobi and Alex Kidd in Miracle World, with the emphasis being on the latter game's Super Mario Bros.-style platforming action. Alex journeys through the game's 12 stages, running, jumping, swimming and slashing, while exploring city streets filled with ninja, evil henchmen, high-rise scaffoldings, underground caverns, dangerous jungles, and bodies of water filled with not-so-friendly marine life. The cute, top-of-the-line graphics present everything in a cartoonlike, super-deformed style, and the music is an agreeable combination of tunes from Shinobi sped up with an Alex Kidd style of beat. The only real problem with the game is that everything, from the secret entrances to the attack patterns for bosses to the jumps, is obvious, making the levels too easy for older, more experienced Kidds. ~ Geoffrey Douglas Smith, All Game Guide