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Vic Tokai created this platforming adventure for the NES where the player must defeat the game within a strict time limit.
Kid Kool was originally named Kakefu Kimi no Jump Tengoku: Speed Jigoku in Japan ("Kakefu's Jump Heaven: Speed Hell") and featured a then-popular child actor named Kenji Sagara. Since the license wouldn't mean anything to westerners, the localized version's name (and the game's hero) was changed.
Unlike most platformers, momentum is very important in Kid Kool. He takes several steps to get up to full speed when running and cannot stop on a dime. There is no air control, so how far he is able to jump depends entirely on how fast he was going when he left the ground.
Kool faces a variety of enemies. They can be defeated by jumping on their heads. The first jump drives them into the ground and the second eliminates them. They also can be beaten with a furry companion that Kool can pick up by running fast enough past the appropriate spots. He can be thrown with the B button, then retrieved by standing near him. He also affords some protection as if Kool is hit while holding him, he will only lose his companion, not a life.