Your art style is so good, but your watermark is a little distracting, would you consider using full opacity text, and perhaps putting it in a corner? The higher your contrast the harder it is to see clear text, and its most notable on the second image in "Jelly"..."ed-Z"..."mbi"..."(s)" all of those letters are hard to see from a graphics art point of view.

May I suggest taking a "graphics art" course in school or on youtube to learn more?
Things I remember from my time in highschool:
-Red is the highest contrast to Green, because it is on the opposite end of a colour wheel

-The more colour contrasts you have, the harder it is to see greys (black and white to colour images only colour part of the image)

- when you use grey its harder to see coloured shading (like when you shade red with purple, or gradients)

I feel like if you made the text pure white or pure black at 100% opacity it would be super easy to read and still do all the things you want it to do