Hum, I am on mac os. But it's really near linux. I go to my applications directory, I open the teeworlds directory. After, I open the package "teeworlds" : teeworlds.app/contents/ressources/data/ . In this directory, I find maps/. I go on, but there's just the classicals maps. I've try to show hide files, but there's noting...
Could you help me? Thanks.
EDIT : that's it ! I've found it !
For the noobs, that's how get .map in mac os.
1/ start Terminal (Applications / Terminal)
2/ type that in the Terminal : cd /Users/***the name of your user***/Library/Application\ Support/Teeworlds/maps/
3/ type that in the terminal : cp ***the name of your map*** /Users/***the name of your user***/Desktop/
4: That's it ! The file is in your Desktop !