I liked this game and will be pointing people at the Steam version. To expand on my review about what I didn't like in this otherwise good game:
-A simple tutorial might've been nice. Just a few-turns-long thing where you're told to build a power array at point X and hook it up, then connect a water plant to a base with pipes. A new player might get confused, saying "what do you mean it's still not hooked up?" and not realize when you need tunnels, pipes and wires. Might also point out the ability to set buildings to 1/2 or off, which can become important.
-I never made much use of the late-game soil enhancer devices, maybe because I had set the map to have adequate water... but if I hadn't there wouldn't have been enough spare water for them anyway.
-In the late game, happiness only affects the ability to get 0%, 50% or 100% of the new colonist batch. I found it rewarding to try to get the happiness stat up, but would've liked it to have some greater effect like increased productivity. Also, for there to be some other way to raise it. I'm imagining something like "create a constant resource drain because you're manufacturing luxury goods", "genetically engineer people so they can now reach workplaces without using tunnels", or "start trade with another colony to lose X resource but get a net gain of Y".