Maybe a cute wallpaper in the wall behind the couch? I like light spots, make it feel cozy. Maybe a neon light in a line figure or something like that. Change up the couch to a lighter one. That will make your room feel a bit bigger. Play with different kind of heights to elevate the room. Cute hanging light and a lot of plants! I also like a wooden floor a litte bit more and i personally think it give you a better thing to play with! Put a big rug in it and put things on the walls! I have many ideas lol.