People use good as an adverb all the time when
speaking, as in My car was just tuned and runs real good now or
Burning the sauce stunk the kitchen up good. In writing, it is
perfectly acceptable to use the adjective good with linking verbs
such as be, seem, or appear: Plans for the reunion are looking
good. The soup tastes good. But the use of good as an adverb
with other verbs is not common in writing and will in all likelihood be
frowned on by your readers. Use well instead. Thus you should say
The dress fits well and looks good
Be careful when using good and well after the verb
feel. While both of these adjectives can mean “healthy,” your
readers will probably interpret She feels good to mean “She is in
good spirits.” If they see She feels well, they may assume the
reference is to her state of health, not to her mood.