Your color choices are really great! I like your attention to color temperature.My only crit is that your figures get cut off right at their ankles, you may want to move them up or down in the composition?
I agree, the figures need to be moved up. I am sad I dont get to see the girl's shoes! The bush/tree takes up a good third of the composition, and isnt nearly as interesting as the picnic scene below (maybe add some spring flowers or a birds nest to the tree?), and the type contrasts enough that its visibility wont be hurt if it is smaller.