This is the thing man. When you place two onjects of attention in the same photo the compete for attention. Like I want to say, "what am I looking at the tree or the barn". In this photo it is a tie between the tree and the barn, and think about it have you ever seen a football game end in a tie. People relate photos to real life. They need somthing to be dominating or overpowering. They need a winner.
So what you have to do is always make sure that your pictures have a main subject. Also avoid distracting backgrounds. Thats why I think this photo did not do well. Somtimes people dont even know why they dont like a photo, they just dont like it. Mainly beacuse of a technical error in the the photo. The funny part of it is, they have know idea about the technical aspect of photography. That goes to show you, the technical stuff makes sence.
I reccommend the book Learning To See Creativily, it is a book you can pick up on amazon.com, (gives alot of tips). Well keep it up, dont give up or get discouraged. If you need any other help feel free to ask me.
Nice work and it really shows abandonment... Things I would have changed personally about this photo is the angle (Location of the tree) it's very distracting and takes away from the actual interest point, the barn. Also, it seems a little over exposed on the left side of the barn. But overall nicely done.
I think for being 13 and this your first photo endeavor you did excellent! You have a great eye that I'm sure will develop over the years to come...just keep snapping and follow your gut....
In my opinion if you cropped off about 1.5-2 inches off the left side of the photo it would have made for a beter submission. As it looks, it looks kinda blown out from the contrast of the sun on the left side and loses a lot of clarity/definition in the rest of the photo. The tree in the foreground is not needed to make this photo and I find it to be very distracting. Good luck in this challenge.