I have purchased this, your artwork is lovely and the cost is really low, thank you. But I can't really call this pixel art - it's full sized artwork that has been scaled down, and so looks very dark and blurry as a result. It needs to be cleaned up or drawn at the final scale from the beginning.
You're a very good artist, your full sized portraits and your background artwork has come out really well. But small detailed characters like this need to be done in pixel art style properly to look clear.