i asked for advice but nobody wanted to give it to me. i made a topic and got no replies. i asked on the challenge topic; and no help was given. had no choice i was high and dry.

i know i need work on the colors and shading of background. but i can't shade it i'm just not that good :( and also what colors do you guys suggest i use for what areas in orde  to make it look like it isn't pinned up in the air?

Too early you bringed it out of WIP. There so much stuff to add. Without explanation you'd tell that it is sky on the background, not water. And how to tell viewer that it is water? By adding STUFF - waves and things that float on it or moving in it, splashing around (maybe requiring larger canvas to fit). The platform also doesn't telling much or brings any variety at this point. Come on, edit it, give us more!

yes I agree if you are going to make a mock up make it larger as if it were a full screenshot, and add more stuff, a mock up is actually a cool idea for this challenge.  I think you could improve the cyclops' outline a bit though.

I yes the water drought. Anyway I think you could have added enemies a hud and made it bigger. At the moment it is very small and boring.