Well its kinda hard to critique her from those pics but it loks like she might be leaning a little too far forward at times. Although I do ride western and only read books on english so I may not be exactly right.
Not very good critiquing pictures but from what I can see the jumping is fine. She could turn her toes in a bit but other than that fine. On the flat she should turn her toes in and put her thumbs on top, lifting them just a tad. She also looks like she could be hollowing her back. Instead of sticking her butt out just flatten her back. Her pony is absolutely gorgeous.