"Similarly, if God created the universe using the big bang as a tool and then allowed it to proceed according to the laws of nature He established, then who created the universe?
I don't have a problem with calling God's action the "Big Bang."
"The "organized tends toward disorganization" seems to
suggest the myriad possible changes of natural selection."
Natural selection only suggests survival of the fittest, not species jumping as one of the "myriad possible change."
"Also, species boundaries are changed through evolution.
Reproduction outside of a species doesn't occur because
the species is redefined by the successful changes it
adapts and absorbs."
Seems like a catch-22, is there a species boundary window that opens and closes?
Or there is no real boundary. Species is, at least to some degree, a human-invented arbitrary concept. When two organisms become different enough, we call them different species. One definition of "too different" is inability to interbreed. This definition doesn't always work too well, though, such as with organisms that reproduce asexually.