I like the idea. It seems to require a brighter/sunnier environment, however: brighter sky, castle, and foreground with strong shadows cast by the towers and figures. I would use the shading on the assassin to determine the light direction and how to shade the rest of the elements. I think if Ms. Macgyver were using a belt buckle or had her compact out while powdering her nose, this would portray a moment of greater creative spontaneity on her part.

Seeing as your not impressed by it yourself... maybe you should keep at it till you get it how it is in your head...

all the best ............. not bad .............