Different colored eyes....... nice idea, and on topic.
I'm afraid I really don't like this "high key" - I think it got a bit out of hand. I would prefer to still see at least a BIT of detail.
What I do not like about this picture is the "blown out" ness of it, I like high key images but when they still have some texture and are not completely blown out like this one. Still gave it a 5 as it meets the challenge head on.