a few nitpicks:
1. the saucer lineart has some irregularities.
2. shadow at the bottom of the cup is strange, and makes it hard to read shape - the cup blends with the saucer.
3. The black background could be replaced with a proper table texture.
4. Some antialiasing on the edges wont hurt.
Thank you @snv for all your feedback. Could you please help me with information, how can I edit/update image without deleting it and uploading again?