Hard to see from this angle, but if his arms aren't bent backwards the upper part is a bit short, and also the whole arm should be placed a bit higher, close to the shoulder. The feet looks a bit big and wide. And I'm not sure what's going on with the lower part of the leg...can't really remember if that's exactly how those muscles flows... anyways these crits are for a human... so you may decide to flush my opinions down the toilet.