I don't know if English is not your first language or if you just don't understand the colloquial usage of the word look. "Looks" is frequently used as a shorthand for "Based on what I see, I anticipate it will be".
If I say "looks like rain" I am saying "based on what I can observe I think there will be rain". I am not saying that the sky literally looks like rain. If my waiter brings me a steak and I say "oh that looks delicious", I am almost certainly not saying that the steak literally looks delicious, since it is impossible for something to somehow visually be delicious (unless you have synesthesia or something). I almost certainly mean to say "based on what I can observe, I anticipate the steak will be delicious". If I see a trailer of a movie and I say "looks boring", I am almost certainly not saying that the visuals of the movie are boring. I am almost certainly saying "based on that trailer I anticipate the final product will be boring." And when someone says "looks god awful" they are almost certainly saying "based on what I can tell, I anticipate this game will suck ass."
"To look is to use sight to perceive an object."
So how does looking at something make you feel something?
Basic stimulus response. My dog sees a petco bag. He has experience with these bags and knows that in the past, petco bags have generally contained toys for him. So when he sees the bag, he feels excited.
Since I was kind enough to answer your question, kindly answer this one. Are you aware that words have multiple usages?