Looks fantastic!!!

I am of a different opinion to Harry regarding the second screenshot. The brown pixels in the background tell me this is an underground scene -- if that's the case, then they're doing their job. The green pixels in the foreground (as opposed to a more realistic rocky colour) work well as they stand out from the background without looking ugly or monotonous, but perhaps they could be dulled or be another colour to accommodate more tastes.

Well done! This is gorgeous!

Jibb