Why? Because you say so?

Your argument appears to be this: "I do not understand how the universe works, and therefore there must be some sort of supreme being."

You might just as well say, "I don't understand how computers work, so there must be some person inside them."

Your not knowing how something works is no proof of anything at all.

A much better argument would be this: "I do not understand how the universe works, and therefore I will not jump to conclusions with no data whatsoever."

By the way, living creatures are amazing but also put together in crazy, janky ways.