It is kind of hard to see in the pictures because of the shadows. I think your legs may be back a little too far. It is just really hard for me to see a lot of it because of the shadows. Looks like you might have a good hands. You are looking ahead instead of down which is great. You might be leaning forward too soon at the beginning of the jump in anticipation, but without a video it is hard for me to tell. I am not an expert by any stretch of the imagination.
I think if you posted a video of you jumping, it might be more helpful for those that do know a lot more than me to critique you.