Actually, this discussion questions whether God could be scientifically quantified, not just some supreme being...There could be hundreds or thousands of supreme beings in existence but God is commonly referred to religiously as the one and only being above all else, the alpha and the omega, creator of all things which would include being a creator of all supreme beings, from our perspective...So religiously speaking, god isn't just some supreme being, it is the one and only, set apart from all else...
Since I'm not a religious minded individual I do not subscribe to this notion of a God creator of all things, however as
@AlienView mentions, the idea of intelligent design is a possibility...I think the universe is far older than presently accepted with periods of collapse and rebirth, an endless cycle which has been built upon over the eons by those who preceded this present state of existence...We can call them supreme beings, those who evolved over those countless eons developing themselves to a point of being able to create through intelligent and willful design...We could be one of their designs, created to evolve through their intelligent design within those periods of collapse and rebirth having finite opportunity to grow and evolve consciously...After all, in the book of Genesis, it's mentioned; "Let
us create man in
our image"...
...