Thanks for the kind words! Hope I got the message just right w/ my terrible German skills. :D
The game itself is planned as commercial, but since the demo soundtrack was put as means to give something back to those who have donated before the beta was out, this remained as 'pay what you want' with beta accessible if you pay the planned full price. I might do some changes to make the page less confusing in the nearest future and place the demo soundtrack on a separate page. :)