So, i did a bit of research (i'm not familiar with Linux) and i found that the problem is indeed linked to the version i used to compile the game (20.04), which use GLIBC_2.29 that you don't have on Debian 10. So i set up a virtual machine of Ubuntu 18.04, and compiled the game with it : now it should be playable on older versions! I put a second zip to download above, can you tell me if it works? Also, thanks to your comment i realised that 2 dependencies are needed in order to run the game (libcurl4 and libopenal1) and added them to the install instructions!