fixed minor issue with linux archive and removed redundant code

minor fixes for windows and linux. there were some debug lines remaining, so we removed those.

with linux, there was an issue when extracting the archive. lukas f. hartmann helped us with this:

cd pieces\ I\ -\ a\ maskros\ nebula\ game\ \(linux\)/

chmod 755 pieces\ I\ -\ a\ maskros\ nebula\ game.x86_64

on wayland, lukas wrote:

export SDL_VIDEODRIVER=x11

to start the game: ./pieces\ I\ -\ a\ maskros\ nebula\ game