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Parallel World (ぱられるワールド) is a puzzle video game developed by EIM and published by Varie. It was released in Japan for the Family Computer on August 10, 1990.
Having been sucked into and stranded in an alternate universe, you and your girlfriend must work your way around the puzzles of a magnificent castle to make your way back home.
The castle itself consists of a total of twenty worlds consisting of five stages apiece, each of which is filled to the brim with enemies. From your overhead view, you must use your directional pad to move your character around the grid and push the onscreen obstacles into your enemies to destroy them for the keys to escape as well as other goodies (extra time, bonus points, etc.), but keep in mind that you'll need to use those same obstacles to construct a path to the exit. And don't forget to work fast either, as you only have 100 seconds to clear each puzzle. Fail and you'll lose a life (you start with only three).
This game may be played with either one or two players (simultaneous play). Player One controls the boy. Player Two gets to be the girl. Both must have their wits about them to make it past the hoards of springs, crazy rollers, witches, zombies, and more to make it home in one piece.