debshapiro100's ideas
Nice use of beadboard. Drawers and around bunks. Ads interest to the bunk area.
Another upholstered mattress.
An example of top and bottom lit LED mirror.
We could carry your vanity material up the side walls. Mounting Jills mirror on and do a recessed medicine cabinet at Roberts side out of the same "finish". Whether it be wood or painted surface. And probably do the same over top of the mirror, thus creating continuity is the vanity space.
Adding a subtle, multi colored rug somewhere, can add interest.
Q