Sweet. Here's my view on it.
First room is nice, though a little to dark in my honest opinion. The control pannel looks great, just needs a little... spur, to make it more lively, if that make senses. Also a little plain in the back.
Second could use a little variation in snow, and again, make sure to merge snow with the pavement.
Third is awesome. No complaints.
Fourth, seems a little plain. Is that a dead end where there was a path once? (where the lights are). :S
It's also just a little too... plain. Just need one or two things again.
I like it. It's not as nice as some of the other maps, but is still very nice, and good enough, especially if you improve in the areas I've suggested (and of course other people's suggestions
).
Edit: When I say it needs a spur, I don't mean more buttons. I mean, the surface it's on looks... artificial if that makes sense.