I like it, a lot! 

That sun is amazing. o:

The background would look better with a dithered or patterned gradient, I think. Right now the shading has a metallic-looking texture.

Fantastic background!

Not so sure about the ronin, I wonder if he could have been red? Or else, a bit closer and larger?

Mmm, very clever use of the palette. 

Love the "simple" style. something about it just makes me love it.