Don't listen to what the reviewers are saying, or the idiots on the internet. Spore is amazing. Every part of it is awesome. Evolving your creatures and society is incredible. Everything is great.
Without further ado, here are some animated GIFs that the game AUTOMATICALLY made (I didn't even know they existed until I was looking around my spore directory). These animations show some of the creation process that went into the different stages of my creature.
First, here's me, creating a Sandworm from scratch:
And here is the creation of my space ship, the Arturan Mega-Platypus, from scratch:
And now, a selection of important evolutions of my creature (there were more, this is just a small selection):
Here you can see how radically my creature changes through its evolution. You can watch as I add legs to my small creature. After that you can see me add arms. Then I add another set of arms, which eventually turns into a set of weapons. The mouth and overall bodily structure also changes quite a bit. I made most of those changes in order to give my creature better stats and help it survive better. When something didn't work right, I removed it. When something worked well, I did more of it. The player of the game is playing the role of Natural Selection. It's awesome and educational!
Also, I want to mention that there are some people who actually think Spore is "evil" because it "promotes evolution." I have one response. Spore "promotes evolution" the same way Super Mario "promotes gravity." Thank you, that is all.