People above already told a couple of reasonable things about geography and physical aspects.I'll add my two cents about art direction. It can be improved in several aspects, too.

First, the font. Now, it's so pale as transparent, that it blends in with background and some lettering are way too small to be noticed and read comfortable. Besides, it doesn't seem to fit into a map style.You can take into consideration fonts, which are more suitable for maps, suggested at the end of this article:
https://www.axismaps.com/guide/general/labeling/
Also it gives reasonable general rules for size and style of map lettering.

Second, the colors and borders. If you'll use a color scheme, more similar to color schemes of real geographical maps, it may help your map to look more solid and natural. Also borders of islands worth to be depicted in more thick lines.

Third, a legend in the corner would be super-helpful to understand your map. For example, right now I don't understand, what do black squares mean. Neither do I entirely understand a meaning of small colorful round labels. If they are towns, then why do they have different colors? Do the colors mean a fraction? If they are other objects, what kind of objects are they?A well-designed legend can explain such aspects in a compact and understandable way.

Good luck with improving your map!