Very interesting and magically looking photo. I love the atmosphere of light, promising some miracle to happen. Light rays are great, choosing tree to stand on side is good, but fireflies are bit too much. i think picture would look good enought without them, only with the sunlight curtain. Fireflies make it look more artificial, more photomanupulation than real photo. Or they could be used only on the field part of photo, not on sky where they look like stars, too bright and bit disturbing. However technique is qiute good, I like how well composed picture is. Overall expression is great, I can only recomend you to use less fancy details, sometimes less is more, but it´s still beautifull photo and I love it.