Little details - Calamity never shows his buttmark allways wearing some barding (and battle saddle). Medical boxes have only one butterfly. Velvet made Fluttershy's buttmark out of three of them. Pipbuck on right hoof - good catch, she's leftie. Art looks like they're not there - like it's two different arts (characters and scenery separately). All in all - looking good, you can do better.