He hangs his feet especially his knees, which won't be good when you progress to higher fences. Also his legs are uneven. I know you asked about your horse, but I think you should raise your stirrups a hole or two and, you're saddle looks too big for you.
At this point, it looks like he is just cantering over these jumps. He seems unimpressed and not really putting a lot of effort into it. He's not really using his head or neck over these jumps either. I think once the jumps get bigger, his knees will become more even, but for now, like others have said, his knees are hanging some.
My favorite picture is the first one.
IMO, you should work on your 2-point. It looks kind of awkward. It seems like you should bend more at the waist and focus on keeping your legs secure. On 4 your legs slid all the way up to his shoulders, and on 5 they went all the way back, as well as the stirrup iron going back to the heel of your boot. And in the first pic, your saddle looks way to far forward.
Sorry, haha :/ I don't mean to be rude or anything like that, just pointing out what I see.