Alright, you asked for it Azkai, here we go. A legitimate Frostyfrog critique.

Zoomed out at the normal 95x95 size, it is a little difficult to see the moonlight fade in and out. Zooming in a little bit, I was able to notice both the fading and the distant grass moving in the breeze. I personally think that it's a little too subtle for the small size, but I see what you're trying to do. The falling start is a nice touch and helps.

The lower grass moving seems like it's a little too close to be moving, considering that the surrounding grass isn't moving, while the grass next to the armpit is. It kind of reminds me of some of the animations in Freddy the Fish.

And finally, the most obvious thing that I was noticing, was that the breathing chest doesn't seem natural. It's a bit more noticeable when zoomed in, since it seems like it's just being dragged up. Normally, a body part will begin to curve when it starts moving, and that currently can't be seen with how it's moving. The body also doesn't drag other body parts up with it, but rather, they would get pulled inwards a bit as something moves out.

Last note is: when you breath, it's not just your chest that's moving. Unless you're really trying to stay still, your arms will move ever so slightly. At least, that's what I notice with my own body laying in the above position.
P.S. I just noticed that the hair coming down onto the chest isn't moving...

Besides those points, I think it looks pretty good and it looks like you've put quite a bit of effort into making it. Great Job, Azkai. I hope that this official Frostyfrog review/critique helps out a little bit. I'm really digging the nighttime sky and the scene you've placed before us. Despite my critical criticism, I still think that it's a beautiful piece of artwork. <img src="e.deviantart.net/emoticons/b/b…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="366" title=" (Big Grin)"/> If there's anything I can do to improve my own criticism and what not, please let me know. <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="391" title=" (Smile)"/>