Really relaxing game. I like it. Especially the movement of the birds. And the effect when you fly over water is also really nice. You can do more such things of beautiful points for the player experience. Like whirling tiny leaves of the conifer. I also like that the clouds are reflects in the water.
But you should increase your clipping. Looks a bit odd to see a mountain growing and shrinking.
Anyway, was a really baeutiful experience for me. Thank you. :D