Who knows aliens might have created us but I don't think you can say god is an alien, that idea just reverses its self around to what created the aliens in the first place, people will say god and we're back to the same debate, though instead of humans we'd have aliens.
The tweaking chimp DNA I assume is just an idea modified from evolutionary creationism. The aliens made humans from chimps, which either implies that there were chimps already on Earth when the aliens got here (how did they get there?) or they took a really stupid way of creating us.
Also isn't that a really long winded way to get gold in the first place? They had the technology to create us and to travel to the Earth, why not save all the hassle of humans and just use robots which would last longer, be stronger and easier to control and create than humans. Anyway primitive man had no way of getting lots of gold that would be needed in the qunatites I assume the aliens would have needed, you'd have to be looking relatively recent for that.
'Ezekiel came down from the heavens on a "giant wheel', hmm don't think the bible was trying to say that he was an alien, because theres a lot more of the bible that doesn't say that then 1 or 2 lines that might, with a huge mound of salt, be taken as meaning he was an alien.
As an atheist I don't think theres any posibilty at all of this, there could be a god, there could be aliens that created us but theres no way that they are one and the same.
Let me be the first to congratulate you on witnessing pure perfection!