Hi again everyone, I really appreciate all your critiques/suggestions! I have finalized the cover illustration and attached it here (it is a bit tilted and logo/texts on the cover will compensate for that). The editor also prefers a really whiter background so I changed the level of background digitally.
I learned a lot from this experience, and .... also realized there's so much to improve in my illustration as color palette, way of rendering, etc. .... so more critiques are definitely needed in the future
Thank you again!