I like it, I like two elements in particular. The enclosed sea is a great reason for vibrant trading cultures to develop. And narrow land masses are always perfect spots for borders and territorial conflict! Now, I'm not totally sure what the scale is, but if the dolphin looking island at the upper right is a polar region then the land masses almost feel like they need a little more complexity, but that's just based on my opinion and preferences. Again, it depends on your scale. Is this the whole world, or just a portion? i.e. do the upper left and bottom right corners connect with each other?

Keep it up, you have a great start!

cheers,
Meshon