Okay, here goes! My first critique, so please forgive me if I make mistakes!
The composition is nicely done, very symmetrical. I also love how you use the Balinese concept as his headdress. Not to mention the details, I can't never do the details as good as you. The shadow is perfectly done too.
However, this type of thing where a person stands in a stoic mode had been done over and over of times, which is not bad but it would be good to add some originality, like puppet shadows perhaps, just to incorporate some culture in it. If can, adding smaller things like shines or texture on the head dress is fine as well and as for his expression, perhaps make him looked more haughty than stoic.
I hope this critique is helpful!