I like the little day bed and the window and beat board walls. day bed on plywood base with built in table. we would put the long edge further back for under the bed storage space. I also would want to paint it like white or something.
Alternative to couches-two twin beds that can swivel. Would love this in a game room. Great for sleepovers young and old DIY tutorial includes super easy design for headboard/back of couch! + 27 Ways To Rethink Your Bed