@Sam Yikin, I actually think we a fairly large amount of fossil evidence.
I think Spore should have made several changes to the creature editor to make it more "evolution like". Things like the inability to remove body parts that have been added, ability to only add so many spinal bones per change, have the size of older parts limit the ability of newer parts, etc. The only problem with the evolution thing and Spore is that Spore isn't based around the evolution in the first 2 stages of the game (the shortest and easiest 2), but this part of the game could be remade into a new game called SimEvolution.
The entire game is gearing up to the space stage, which is where the fundamentalists should really be tearing into the game. Life on other planets, an actual omnipotent being you can actually talk to, etc. These are the aspects of the game that really slash into the Christian fundamentalist views.