Fun concept and great challenge! I like the scene that you've set.
I'd also love to see some additional shading! Also, the perspective on the house seems a little off (check out www.technologystudent.com/despro_flsh/houseflat1.png for a sample).
I really like the font and the interface for selecting items. It's very clean! Good work :)
Good atmosphere. A bit of cell-shading and anti-aliasing goes a long way with this palette though.
Thanks for the comment, I appreciate it!
About the perspective, it it was on purpose, like diagonal because the ground and snow are creating a mini mountain.
And about the shading, I'm a bit bad with the shadows and lightings but I will give it a try.