Hi,
Thanks for your continued work. At this time I'd like to keep the design "open" with no border like you have on 8, 9, 10, and 11. The water color look on #15 is nice, but perhaps making the balloon directly up instead of slanted. I also like how you have the grass mingled with the tree, but perhaps can it be less dense and more like the strands of flowing grass curved to the right (showing wind) similar to the picture I uploaded? The leaves coming from in front of the tree is nice, perhaps the colors can match the tree. The clouds could be a few clouds but smaller in the distance and more light blue/white than gray (less stormy). The wind marks you have make me think the balloon is spinning, perhaps eliminate those but add some white opaque curves under/through the tree continuing with the falling leaves.
Thanks for your effort.