Where other than Revelation does the bible even come close to identifying the snake as Satan.
As far as who was telling the truth what did God say when he found out that they had eaten the fruit? (and why didn't he know they were going to eat it.. not very omniscient was he?)
Sometimes in your quest for literal reading you end up interpreting a message in a way that it was not intended to be told. You are not helping people by glorifying the snake and demonizing God.
Sometimes in your quest to turn god into what you want him to be you end up interpreting a straightforward text into WOOOOO. You are not helping people by making your God, and by extension you, so stupid.