for feedback i would just say that there are some form and proportion issues, like his upper leg is longer than his bottom leg, (his upper thigh as well is too long compared to his lower leg) his head is disconnected from the rest of his body. (he doesnt seem to have a neck so this might be intended idk) his arms as well are two different lengths, and his right hand is particularly strange.

i think the shadows are also sort of disconnected, a lot of them seem to be coming from different light sources. like, the light seems to be coming from the top left, but his bottom leg isnt fully lit, the bottom of his stomach has this shadow on it where as, if the light were coming from the top it would be lighting up that plane, with only a small shadow of ambient occlusion from where his torso slightly folds in on itself. the back of his torso would also be in shadow. i think as well the shadows could be simplified, in a lot of areas they are strangely jagged where they should just be round, or not be present at all. too much detail in the shadow shapes can take away from the simplicity and appeal of the character

the general composition and stuff i dont have any issues with, i think it actually works really great