Squall, I think you can possibly improve the background of your story by condensing the continents and de-cluttering (removing excess mountains, trees, land etc.). One or two big continents on the east and/or west, a small island in the middle, a desert continent to the south with a barren island to the south-west or south-east. And one snowy continent. I'll point out the advantages to this setup.
1. First off, it gives the players a clear idea of the major continents, and also helps them remember what is where.
2. Secondly, it might help you develop an in-depth and more interesting backstory for not just individual towns or continents, but deserts, forests, swamps or any other setting your game will have. Makes naming them a lot easier, and players are more likely to prefer dungeons with a bit of myth or history rather than just another area with monsters to pass through.
3. Inter-continental travel and setting up a port-town/towns is a lot easier if you have a small number of continents. And you can have your players travel to all the other towns by foot or other means after having docked their ship. It would also be interesting to see how you set up a port-town in three different climates : desert, snow, and plains.
4. Having a single large continent will give you more space to put in a river without having to cut up the continent.
I know all this might seem difficult to implement, but it's just in case you need suggestions.