Cye
Platform: ColecoVision
Region: USA (Homebrew)
Media: Cartridge
Controller: Joystick/Numeric Keypad
Genre: Puzzle
Gametype: Undefined
Release Year: 2007
Developer: Philipp Klaus Krause
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Cye is a clone of Kye, a Boulderdash-like game. It has 28 levels, 5 of them are two-player levels. 

http://colecovision.eu/ColecoVision/games/Cye.shtml