I played this game, oh goodness at least 7-8 years ago on an Emulator, probably longer than that. It was an age that I hadnt really been taught much about evolution yet. And it was so funny, because I played that game, and when I started learning about evolution in textbooks, and the fossil record, I thought back to the game and remembered "Oh ya, thats right..."

Sure, its extremely fictional, and some of the chronology of it is mixed up, but its actually a pretty decent "wide view" of Evolution, starting with fishes, those fish evolving into having feet like body parts, holding their breath and adventuring onto land, eventually being able to breath oxygen, reptiles come about, end of the dinosaurs, mammals prosper, etc