Legere tibi placet? was marked wrong. I thought -ne was optional. Oh well.
-ne isn't opitional. You HAVE to put it if you are asking for a yes/no question.
Is order important? Why not : legere tibi placetne
The word that -ne gets appended to tends to come first. Think Duo demands it comes first. Not sure how common it comes elsewhere in a sentence off the top of my head.
Why does "you" take the dative rather than the nominative... Aren't we "nominating" you in the question?
The verb placere is more literally "to be pleasing to". The Latin is closer to "Is reading pleasing to you?" but "Do you like to read?" is more idiomatic in English.
So how about "Legerene tibi placet?"?
I think that means “Do you read to like”