This space is fun, but I would like more color. Maybe a colored couch. Love the tulip chairs and mix of coffee tables, like the art somewhat. Love the fuzzy rug. Love the ceiling, though plain wood would be better.
A cheap and quick way to separate space in a studio apartment - use pallets and a sheet of wood over the top to create a designated living room area. Also use planks from pallet to create a wooden wall to further create a sense of a separate space.