I would go with drapes to the ceiling. Some visual

"Organic" can mean freeform, curving shapes (like your sofa and rug), but usually also means natural materials (wood, stone, plants, etc.). Maybe substitute linen drapes (hung higher, as Celery said) for what look like synthetic ones and branches in the vase instead of the plumes, add a tall plant in a basket, a rattan coffee table, and nature-themed art?

I also added a modern floor lamp, which I love, but this one is rather pricey; you could substitute something less expensive that shares its clean, contemporary shape.

Just curious: Do you find the furniture comfortable?

I found the coffee table too matchy match shape wise with the couch... You have beautiful window frames!! Celebrate them by hanging the curtains so they are off the frames when open!! It's sooo passe to push this "curtains to the ceiling" fad, but I would get the rods off the window frame and since the gap between window frame and curtain rod won't be in your face wide when hung at the ceiling, go for it. It's a horrid look if your ceilings are high. Bamboo shades hung within your window frame might actually be more organic than curtains, and would add the texture one expects in an organic space. Instead of the stars I would look for yarn art sculpture. The sconse hung between the windows...why? If it stays it needs a reading chair....

First a coffee table has to be reachable by someone not in the center of the space . Organic and an air hockey table in the space really does not work in my brain but that is your style. I would choose end tables with lamps and move the sofa to the wall on the right so people can use the air hockey while others are seated on that very uncomfortable looking sofa..Get art on the walls no stars and honestly who sits in that chair it looks all wrong for comfy organic style. I think organic is an inviting space if done right so in my head something like this .