I gave you one of my highest scores! I'm disappointed you didn't score higher overall. What a great picture! You really captured children playing this game! I love how the child at the bottom is in that dynamic pose. Gorgeous tree. Personally, I like that the background is washed-out; otherwise it would detract from the foreground action. Well done.
I wish the boy in red looked a little more like he ws trying to hide, maybe by crouching and looking at the kid who is trying to find him. neat picture.
Great composition. Needs a little more light. I'd try spot metering on a something that's not too dark or too bright, maybe the ground to the left of the tree.
The pose on ground-boy is classic! Very tough lighting situation shooting from open shade into bright sunlight. The blown background only really detracts near the top where it shows through the leaves, IMO. It would take a pretty mighty strobe to fill this scene.