I also have to suggest another one of their early, free games, KOHCTPYKTOP, which focuses on building integrated circuits: http://www.zachtronics.com/kohctpykto

I also have to suggest another one of their early, free games, KOHCTPYKTOP, which focuses on building integrated circuits: http://www.zachtronics.com/kohctpyktop-engineer-of-the-people/ http://www.zachtronics.com/kohctpyktop-engineer-of-the-peopl...