Interesting that Sweden managed to colonise that much of this world of yours. They are a naval power I guess? Good effort from them This is making me want to do my own alternate histories... gah. Top work
It reminds me of an alternate world I was working on a couple months ago, where a Hanoverian succeeded to the throne who greatly increased British influence in northern Europe, creating a somewhat similar colonial situation, although replacing Denmark and Sweden with Britain-Hanover and Prussia.
I just noticed the name 'Britavia'. I see what you did there... I'm planning on uploading some of my own universes in the near future. They're just no use when all they do is spinning around in my head. Gotta write/draw things down!