That's some cool design. The way you mixed innocent things, like the cherry blossoms, with darker ones, like the skull and the snake, makes the whole drawing clash in a very appealing way! But I see the waves gave you a hard time? They seem a bit stressed out, to me.
i really like the snake but the skull is a bit boring ... it looks very nice not to say the least but i think with a little bit of a more angry looking skull it would have looked just that little bit better !
This is really lovely, I particularly like the way you have softened the image using the pink flowers. If I can suggest just one thing I would try to make the jaw slightly more open to make it appear that the snake is forcing itself through. Very good though and I hope you don't mind the critique!