Good morning, nightmare,
(1) Maybe I have misunderstood your post, but "good" is
not usually considered an adverb.
You + look (linking verb) + good (adjective -- describes your appearance).
He + looked (full verb) + carefully (adverb -- in a careful manner).
(2) Wow! I love the way you play the piano. I wish that I could play as WELL as you. ("well" = adverb. HOW you do something.)
(3) To play good = popular but not "correct" English.
(a) That soccer team plays real good. English teachers prefer:
(i) That soccer team plays really well. / That soccer team plays very well.
Have a nice day!
Interested in Language