Look, ill start off saying that your shading is really good, its pretty much the best part of the piece, that being said, OH BOY are there some problems with your stuff, i see youre going for a cartoony and exaggerated art style but a lot of it seems off and even uncanny, the added texture implies more ambicious anatomy but even the hands are drawn in a lazy manner, one character has 5 fingers in his hand while the other has 4, consistency is like, the first thing you gotta keep in check, their bodies are fine but the worst part are their faces, specifically the guy on the right, his skull is extremely small compared to his jaw, from what i saw in your other illustrations you use the hair to give volume to the heads, but it just DOES NOT work here, i dont wanna sound cruel but he looks like he has microcephaly, look it up, it looks exactly the same, one more thing, the way you draw the heads of most of your characters just seems weird and samey to me, what i mean is that they all have long and thin faces with a long nose and narrow eyes, if you browse tumblr for long enough you will see that kind of faces everywhere, im not saying drawing them like that is necesarilly a bad thing but you should try to add some variety in the shapes of the faces, because if you dont everything you draw will start looking generic, and in my opinion thats the worse thing that could happen to someones art, after looking at them for a long time they end up looking like Dan Avidan from Game Grumps.