[arosiem]

I’d be inclined to (if you don’t have one already) pop a dado rail in the room - choose two colours from the Main Street buildings you like and paint the bottom one colour and the top the other.
I’d then get some wall lights to look like the lanterns, a big bluey clock and maybe a gallery wall with the main centre being a framed picture of the castle, along with other various Main Street signage etc.