I enjoyed this game, and you definitely did a good job, however I do think a few things could have been improved.
The only real "visible" changes I encountered were the land (Land) and light (Atmosphere). Nothing else seemed to cause any visual changes at all. I would have loved to see the surface of the planet change as I did more and more upgrades.
There also didn't seem to be any "strategy" or requirements to this. For example, I had more prophets than I had people, and more people than I had animals, etc.
If each tier required a certain amount of the tier below it, it would have called for a little more strategy, which would have made it a bit more engaging than just "wait for enough points to skip a few of the upgrades."
Again, I did enjoy this and I think it is a good start, but at the moment it's more of a proof, than a game. I really do hope you will continue to expand on this, the ambiance and mood of it were all very enjoyable, especially the music.