1) Temptation account is not real. If real, it would mean that Satan and Jesus believed that shape of earth is flat so that both can see "all the kingdoms of the earth" if viewed from the mountain top.
2) Genesis account of Satan is borrowed from pagans, hence not worthy of analysis. Even if it is original, details does not befit the kind of satan he should be. If Satan is so smart as to scheme against God and his children, he would definitely choose some smart method, not a sub-standard temptation as in this case. It is too obvious that Adam and Eve who had already experienced God as their unlimited benefactor would never believe God as withholding something good from them, nor He is a liar, especially when such a malicious suggestion originated from a stranger—with a strange phenomenon—a snake with speaking ability! Also Satan contradicted only the effects of their disobedience, which of course further weakens his position, because prima facie, it is the Law-giver that knows the effects of disobedience, not the spectators who have never seen a violation before.