Got some rather nitpicky crits and advice. Being from an only-beginner pixeler's perspective, feel free to treat 'em how you like.
The bed covers look extremely tight and unslept in for years; not sure who lives in the house but I'd expect a few more creases. The diagonal right part of the desk with the lamp has nicely shaded wood, but the direction of the lines seem off to me. Finally, the top Japanese character seems to face the camera rather than at an isometric angle; if only you angled it a tiny degree more to the left?
Otherwise, though, looks grand.