I would recommend giving it a try to anyone who wants it, however the Civilization age I found utterly dreadful.
I would have to review it by the ages, since, in essence, they are different games.
The Cell Age was probably my favorite age, I loved being a carnivore (and when I got the sucker, an omnivore), but it was too short to be enjoyed to it's full potential. The best description for it is Pac-man on steroids.
Gameplay: 9/10
Variety (IE: Cell Parts) 6/10
Difficulty: 7/10
AI: 7/10
Overall: 8/10
The Creature Age was like a half-assed MMORPG. It was fun, but too easy at the start, and just annoying at the end. I went Carnivore again, and never added any communication parts, and consequentially ended up being a lone wolf fighter.
Gameplay: 7/10
Variety: 8/10
Difficulty: 7/10
AI: 6/10
Overall: 7/10
The Tribal Age was my second favorite age, if only it was a little harder...I again dominated everything in sight. The AI was rather retarded, their attacks ridiculously easy to fend off, and each village offered no variety in the weapons they attacked with. On the bright side, I liked the food gathering system, and the general idea of the age.
Gameplay: 8.5/10
Variety: 7/10
Difficulty: 5/10
AI: 6/10
Overall: 7.5/10
The Civilization Age...I didn't even play for 5 minutes because it was so fucking retarded. The only units usable are the 3 vehicles you can create, and the gameplay idea was horrible. Overall, it sucked. Maybe it was just because I didn't play long enough, but I absolutely hated it.
Gameplay: 4/10
Variety: 8/10
Difficulty: N/A
AI: 5/10
Overall: 6/10
And finnaly, the Space Age; I found this a rather interesting Age, even if the invasion gameplay was quite repetitive and boring. The general idea was quite well thought out, with an actual story (albeit a basic one). Personally I only made 2 colonies, then just started blowing shit up, and helping out my 3 allies.
The PvM was another repetitive part of the game, basically all you do is point your laser and shoot, or in an invasion's case, drop bombs until the city is yours. However I found one thing ridiculously annoying, when the ships run from you and then, while you are following them, randomly heal, turn around, and start attacking again.
Gameplay: 8/10
Variety: 8/10
Difficulty: 7/10
AI: 6/10
Overall: 8/10
None.