Hello Fabiin and welcome here.
Thx for your comments, You're not the only one contacting us being happy to see Dstroy 2 being in progress after playing the game 20+ years ago. :). We will release a new build soon normally, so you should have more to test soon.
About the bugs:
- No sound - It's normal, because we have not started to work on any sound yet. We're waiting for Jerome, the original musician to work on it again, but he is very busy, so, we're waiting :P...
- For the other problem, let's test the new version coming in few day, and we'll see if it's still there. then we will see. We can test Linux versions on Ubuntu too for now, so we should be able to better test the Linux version. We will even propose in the upcoming version an Appimage version of the game, because it's so much easier to propose it like this :).
If you want to join us on Discord btw, you can get more news here: https://discord.gg/ZCMm2xw