The backhand springs were.... interesting.... You should try to jump straight up for a backflip instead of tilted so much and than do a flash kick for this kinda thing, also try to not stand on your toes but flat on your feet
The cork itself wasn't that bad, The setup was nice but the spin was lacking, you didn't contract your elbows which led to not getting the spin and also contracted the knees too much
But if this was your first cork, GJ!