Alex Kidd in Shinobi World

The Dark Ninja, banished 10,000 years ago, has returned to rule Miracle World. He also takes young Alex's girlfriend as a sacrifice. To help Alex defeat the Dark Ninja and rescue his girlfriend, a god enters Alex's body, making him a ninja master.

There are four rounds, with three levels each, and Alex travels through locations like office blocks, construction sites, shipyards, and jungles. He must go through each level defeating ninjas and other wildlife. In the last levels, he must defeat bosses including Kabuto, Heli, Robster, and Hanzo. To survive some levels, you must learn the secret jumping technique. You start with three lives and an energy bar with three units, but losing one unit means losing a life. Losing all three units ends the game.

Additional energy units can be obtained by collecting hearts that can be found by breaking treasure chests. The maximum units you can get is six. From there, the heart is replaced by a mini-Alex. Collect this and you've earned yourself an extra life. You'll also get hearts if you have less than six units.

You can also get weapons like spears and power swords by breaking treasure chests. However, if you're lucky, you can obtain a Tornado icon, letting you transform into a tornado while mini-Tornados whirl around the screen, seeking enemies. This allows you to either go left or right so your enemies get sucked in and are knocked out.