WARNING: If unity player crashes while the game is running, you can lose ALL progress in what is essentially an involuntary "hard reset." Just went from my first protium reactor back to square one.
wsad is one of the most common methods of control, used almost universally in the professional gaming industry as well as in many games on this site. If someone is stumped by the prospect of using wsad, they really shouldn't be playing a puzzle game.
I enjoy the irony of this game recieving the top rating (for the moment) on Kongregate. The point of the game was to realize that we should enjoy a game for its entertainment value over a complex upgrade system . . . and then it gets around 4.5 stars.