Hello! thanks for your feedback I will try to give my work more contrast next time thank you. I agree it does look dull and it looks more of cotton candy than clouds lol. 
also your work is amazing just whoa 
thank you again.
Hm, I wonder if you could keep the pleasant pastel colors but also have more contrast...? I'm sure it's possible, but palettes are not my strong suit.
This is a bit messy, and loads of colors. Judging by your other works, I'm sure you can do better! Maybe clean it up?