The puzzle design was simple, yet challenging. And the graphics did well to bring out the classic feel of the game. I could see this turning into a good, full-blown puzzle game with multiple levels.
A couple criticisms (Really, just me nit-picking), the controls could've been a little smoother; controlling my avatar felt difficult. Also, the overall chamber looks too much like an obvious Zelda clone. I'd make the blocks/tiles a little different next time, to maintain originality. The avatar, boxes, and chests all looked good though.
Overall, I'd rate this as a 4.5/5. :)