Thats actually a pretty good replay. :P But the kick at frame 307, I would follow through with kicks, makes them look more powerful, for future reference, dont immediatly contract your knee as soon as yu hit a kick,try to keep it extended for a few turns, then either contract it,or relax it, to make it flow a bit more. Very good though. Especially since its your first time

Edit: also, looking for something to show about this? look at this spar i just made, look at the kicks