Great real time game. I'm always thinking of my growing planet.
Gameplay: This actually takes a lot of time to even get past the beginning parts of the 'game.' You need to wait roughly a day to get the metal/crystal/deuterium you need for just one building. It's very slow so it'll take you a couple months to even get a bit powerful.
Graphics: Well it's not 3d, but the pictures are really cool.
Sound: What? Click? Oh.
Value: Very very very long lasting. And it's free unless you want to pay 4 bucks a month for some small features.
Overall: It's a very nice game and you should try it out if you are bored most of the time.