Wow! This is looking fantastic.
It might just be my 2am-eyes, but the leg of the lion furthest into the background seems out of perspective or just positioned in such a way as to make the lion's stance a little weird/unstable? It feels like it should be slightly down and to the right more to me...
The way the knight's cape comes to a shallow tip on our right seems a little too chibi in my mind, as if it's a toy cape, or made of very thick material, which conflicts with the flowing nature of our left's cape tip. The right-most tip needs to be a sharper tip, or needs more of a ripple to the underside of it, or something like that.
Also, maybe the puff on the end of the lion's tail could be slightly bigger.
Still, this is awesome work!