Cheats are always a touchy subject, some people think that they shouldn't even be mentioned if they exist, since they ruin the gaming experience. I don't particularly feel that way, but if you do, don't continue reading!!!!
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OK, since you came here to look, here is the cheat...
Press the [Shift] and [=] keys simultaneously to get more money and access to all unplaced improvements (windmills, etc).
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