If you are familiar with two of the most common grammatical elements in most languages, verbs and nouns, then this should cause no problem.
|Nectar from the heavens.|
Good is an adjective. As a result it should really only be used with nouns. You can play well, but you can't play good. Another example: beer is good. Though at times, we believe that has one too many o's...
Well is an adverb and as a result should be used with verbs. You can't have a "well" noun, though you can do something well. You should definitely make sure that you haven't used a verb with "good" as an adverb, because it's not one.