He's trying to practice making sprites. He can mix up the design later when he has acquired the skill to do so, but you're looking past the fact that he's trying to improve for now, so he can do that kind of thing later.
At this point in time, he's not used to spriting familar things in unfamiliar ways, so give him time.
At this point in time, he's not used to spriting familar things in unfamiliar ways, so give him time.