Hey Frankenstein91, as you may have read in the title of the Linux download, it is the old prototype version of Dorfromantik, not the newer demo. Controls were different back then and many improvements (like tile rotation, game over screen etc) are features added in the currently windows-only demo. We'll upload a untested Linux build tomorrow, but as we're a small team and focused mostly on a PC release, we cant' offer support for it. We hope you understand :)