Ok, changed (via GUI) windows size to 2560 x 1080 and activated fullscreen.
Selected the biggest tileset i could find (96x64 i think). Looks a lot better now :)

Selecting tileset via GUI crashes the app. I have to user -t option from comandline.

sound output is set to sdl, but there is no sound...

keyboard often doesn't work. have to start program seevral times until it works.