There is another snoozing spot on the outside edge of the structure, and the men recently placed a thick piece of plywood in a top corner, giving the option of making a loftbed there too.
Inside, keep your body off the ice or ground (the Inuit put their sleeping blankets on top of a bed of sticks and reeds) and create heat-trapping "loft" (it's what keeps you warm in a sleeping bag) by layering a few small blankets or big trash bags, with leaves or crumpled newspapers in between.