http://www.pibburns.com/cryptost/cuba3809.jpgIll use this pic above for reference.
if he open his fists ( btw pandas don't have fists, they have paws, with claws ( if you take a look at the Drunken Brawler icon, you clearly see this. )) they would touch his toes, and he's standing still! imagine if he would walk on his 4 "hands", the forearms would have to bend a lot, wich could be a kind of heavy problem.
As usual, no shading, if you're doing a concept for a mod, do it good, put shading.
Poor details, no folds on clothings, not even a shard of shading ( shading is nescesarry for a good pencil drawing ). Poorly done, you can do better, put wayyy more efforts, and put shading!
your drawings could have some potential, but with only shading it will improve them a lot.