1) I gotta say though when you talk of "the observer" it throws me off as it sounds like the typical quantum woo twisting of the observer effect, perhaps you meant something else? what do you mean by "the observer"?
2) Regarding "the universe is ordered and can be described with a set of rules. There is no full evidence of this, it's just an assumption." this has proven so far to be a good assumption (as seen by the massive amount of scientific knowledge and verified predictions accumulated) and if anything it seems all evidence points to exactly this. Is there evidence that there the universe is more than just 'a pile of particles'? (although that is a somewhat simplistic way to put it)
3) Trying to distill the comment, it seems the main argument is along the lines of "science can't explain life itself and/or consciousness, therefore there must be more" is that a fair assessment? and in that case what would you convince you of the oposite? for e.g what if "life" is well understood and can be reproduced in a lab etc.. what if we can reproduce most human-like intelligence with AI, etc... in other words, what would (realistically) change your mind to the opposite?