That's a really great individual style! I particularly like the mountains. I think with a bit more work it could be a winner.
Here are the improvements (remember they are only improvements if you agree with them and help to achieve the style that you want) that I would suggest.
I think you've tried to cramp too many different styles into one map and the legibility of the map suffers for it. You should be able to look at the map and understand how it works at a glance, but with this one, it's more difficult and the viewer has to work at it:
- The scaling of the buildings is a little offputting...individual houses are fine to define the size of a city or habitation even if they are oversized, but the perimeter of the habitation is huge if this is a continental map. We don't know if this is meant to be one mega city or a place where there are many varying cities, or where there is habitation generally.
On the other hand the tent on the bottom left with the fire works for me...we know there's a camp of some sort there. It's legible as is the big wall with the castle and the lighthouse....made large because they're important features but we know there's only one of them.
On the bottom right hand side of the map you've got houses in the 'lava' area, which again are illegible for the reasons given above, and the colours (I'm sorry) clash horribly.
So what to do?
I think it would work wonders for your map if you used colours that worked for you rather than dropping in symbols where you may not have any choice about the colour that they are. Go onto the web and look up colour theory..it will really pay dividends, especially on figurative maps like yours. At the moment you have so many colours fighting with each other on the map there is no dominant mood to it.
I don't want to be too critical and I'm trying to help, particularly given the amount of time you have spent on this map, as I said, the bones are there but with more understanding it could be utterly fantastic.
My main point is make it legible. To do this, use colour, size, shape and composition.
Hope this helps and welcome to the guild!