SInce it is a compact apartment as most apartments are, having minimal decor with maximum storage will do best justice to the flat. U can have a storage cum visual space seperator which keeps the drawing room seperate from the private areas. The bedrooms can also be kept simple with storage beds, having sliding wardrobes with mirrors which gives a feeling of space. the kitchen also can be kept simple sleek with few highlights.

Hi, Please share some pictures from different angles as we can't give any suggestions without them. Or Contact Tasko for professional guidance at 9985509895. Here are some pictures of work done by Tasko Team

Go for white shades which has hint of green (example Absolute white L161 Asian paints) as there are lot of dark colored elements here and needs to be balanced out and is also good as per vastu. I really like thw furniture and small wall decor you have here.. but I really feel it is underutilized. A good interior designer can really turned around this room with very less expenses and modifications. Please message for any further queries and let me know if my suggestion helped you.  Regards ὠ0

This is shingle roof, its actual pic from my Resort project in Goa