Lets say for the sake of argument you are 100% correct, God was a space alien with advanced tech.........that means that he was a mortal being (or at least started off as one) bound to the same law of physics that we are.
He could have been born into a species which exists at a more advanced level than we do, with a different physical basis. But let's go ahead and assume that's true.
We could, in theory, achieve the same level of knowledge and power as he did (since there was nothing magical about him). How exactly is is he then worthy of worship or awe from us?
Who is this "we"? You and I, or descendants of today's humanity? If it's the latter, then awe at least still might apply.
Also wtf why play stupid games
Yes, this is the part that bothers me, too. But lots of parents do this, and lie to their offspring thinking it's for their children's own good when it's really for theirs.
And leave us a (easily) demonstruably false book as a guide?
Well, not all forms of Christian believe that the book is The Word Of God. At least some of them just think it contains interpretations of a few things he said, and a lot of other stuff people wrote about the faith. A lot of Christians believe that Jesus was basically human, and didn't have foreknowledge, so he had to deal with stuff as it happened to him, and he wasn't really God at the time so anything he supposedly said which is in the book is not the word of God either, not precisely.
This is part of what's so fun about arguing with Christians, you have to figure out what they believe every single time.