Very good.
I don't suppose this is a game for the impatient. I don't know how much time I spent on this game, but it probably was considerable. I just calmly played with the game, patiently, watching the scenes fade into view as I'd change my pecking order of things within the game to try and achieve all of the endings. I did them all without help, save for one, the "Monstrous" Ending was the only one I looked at the guide for. Of course I slapped myself in the face because I know given more time I could have figured it out, but I have some database work to do soon so I kind of had to. I'm thinking I should have come back to it.
My main problem with the game was the music, I could not hear it, nor do I recall there being any sound effects when the UFO came. Perhaps the volume is just too low, but I could hear the sheep just fine. I personally wouldn't have gone with sheep; perhaps a different grazing-mammal that better-suited what was generally the most calming experience of my life (besides post-coitus) such as maybe Deer or something. But that's just me, you're the creator and I by no means wish to insult your creative processes, you did fantastic.
To sum up this game is as beautiful as it is challenging, as tranquil as it is frustrating, and as addicting as it is long. I am eagerly awaiting more like this from you. Thank you for making this game, I very much enjoyed playing it.
Oh...and thanks for marking the mouse-clickable regions, would have been a nightmare seeing the seams without doing so :D.