@a noble wolf that looks really, really good. And really massive! Be aware that it may lag A LOT during actual gameplay, though. If I were you I would heavily consider splitting it up into four quadrants. If you're keeping it this size, you may not be able to use much animations or anything of that nature without it lagging way too much.
I would also consider shifting it to the right by one tile, and painting the rest of the water on the top left ice cap, on the left side of it. It looks strange being the end of the map right there. Then do the same thing with the bottom and top of the map too. Just make sure you have at least one tile of shallow water space on the islands and they aren't just stopping right where the map is.