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.
these wood slats are utilitarian in the way they are connected to the substrate — countersunk screws — but note the care in angling the top of the projecting pieces, so water sheds off the wood. contemporary exterior by Fougeron Architecture FAIA