Some interesting elements to this game.
I selected just right as the difficulty for this game, because I was not sure how to rate it. The different modes varied greatly in difficultly from one another.
It was fun for a while to build your planet up, and watch the strange evolution of its creatures.
I was hoping for more I guess. I wanted to watch the various civilizations grow and not become to warlike. If memory serves, once they started to build cities the game ended pretty quick.
I found the scenarios to be very difficult. No matter how many times I tired, I never once succeeded at maintaining and effective ecology on Mars. That drove me nuts.
The beginning of the game was very fun however. Starting from scratch, to watch life begin in the oceans and slowly mutate and spread onto the land. That was one of the coolest things I think I have ever come across in any game. And when one of those lifeforms evolved into intelligent life eventually, there was always a sense of accomplishment.
Hard to say who would like this game and who wouldn't.
Maybe its worth your time? Maybe it isn't.