Tidy is used with these nouns as the object:
garden, hair, room

be, look, seem
stay
Why does nothing ever stay tidy around here?

get sth, make sth
keep sth
I hope you're going to keep your room tidy.

extremely, fairly, very, etc.
The living room is fairly tidy.

immaculately
It was a neatly furnished and immaculately tidy room.

obsessively

clean and tidy, neat and tidy (BrE, AmE)

Tidy is used with these nouns:
pile, profit, room, sum