Thanks for the comment, Ascension ^^
"tweaks and style" there is just me playing around with filters and blending modes - so I wouldn't call it style yet as I didn't even remember all the tweaks I did >.>

@Eagleyes: maybe blurring the mountains layer a bit would blend it more with the rest of the map; also branching the rivers could probably make them more interesting (Step 7 from the Tutorial, where it explicitly tells to "not forget to put in forks and branches" - here's a real-world example for some ideas); I hope you'll find the suggestions helpful ^^

I'll try making another map using this Tutorial in a few days and post it too, it's a great pleasure working with it