I feel like the art above the water cooler is too much to the right. I would move it a little more to the left. But if you have the ability, I would actually replace it will a picture or painting that is not two dimensional. In other words, a picture where your eye can wonder as if it was three dimension. Maybe a simple beach scene or mountain scene. Something that suggests space since the room is quite snug.

How literal should I interpret this? Are you wanting seahorses, crabs and wall mounted fish, or a more nautical theme as far as colours and finishes? I would set the theme in bedrooms first, that way you have more fun taking risks and can later use the best ideas in other areas of the house. I would start by installing a vertical lining board cladding to the walls, painting them a duck egg blue or sea green. Floors leave timber, with sisal rope rugs under bunk or cabin beds. Lighting is always fun and both ceiling and lamps come in this style. Where possible, plantation shutters on the windows, or install louvre door cut to fit and hinge them across a window, paint in a nice teal blue green and then while still wet, get a sponge and wipe most of it off, you'll be left with a stained old timber. I would hang two or three round mirrors above a dresser like porthole, and use timber oars, either new or old as curtain rods or coat racks on a blank wall. Lots of things for this look, not to mention hurricane vases with sand, shells and starfish, bowls of sea glass, pebbles and shells, and artwork. So many ways to bring in the theme.

I would declutter to much is going on in this room. I love the blue chair maybe you can add some nice candles on the coffee table and books and the throw should not be in the middle of the couch probably different colour through maybe the same colour as the blue chairs. Also get rid of the side table and add maybe a plant and also get rid of the mirror in the corner.

I'd be the opposite -- I love the coffee table ! It is quite different , it matches the chairs , which all complements the rug . The pot matches too , and the plant adds life and a basic colour . I don't like mirrored drawers , but also they seem more boudoir than lounge to me , and then the cart is a different style again -- it's modern that looks 120 years old ! I'd get a long modern white sideboard unit in that white gloss -- 2.5 metres or longer ( as long as it fits somewhere ) , have kept the coffee table , even kept the 2 B&W pics but also have a nice abstract picture , only a bit bigger than the 2 pics , somewhere too -- logically , featuring the green tones of the plant in the white pot . A bit of class , a bit of colour , some leather , and the coffee table as the slightly quirky focal point .