[Bug] Game won't launch on Linux/Debian - SOLVED

[Alex]

Hi, I bought the game a few days ago on Steam but it didn't launch. Today was an update but sadly it doesn't change anything.
If I launch the game in Steam a small window opens but closes immediately.
I already tried reinstalling it and below are some outputs with different approaches and system informations.

I would appreciate if you could help, give some directions or ideas how I can solve this issue or narrow down the problem.

Thanks, Alex

OS: Linux version 3.16.0-4-amd64, Debian 4.8.4-1
Grafic Card: NVIDIA Corporation GM107 [GeForce GTX 750] (rev a2)
Driver: nvidia 340.96-1

Launching from command line in the game folder with "start_linux.command" or "java -jar Balrum.jar":

Code:

Setting breakpad minidump AppID = 424250
Steam_SetMinidumpSteamID:  Caching Steam ID:  76561198272228650 [API loaded no]

Launching from command line in the game folder with "Balrum":

Code:

Loading JVM runtime library ...
Passing VM options ...
Creating Java VM ...
Passing command line arguments ...
Loading JAR file ...
Invoking static gamedir.Balrum.main() function ...
Setting breakpad minidump AppID = 424250
Steam_SetMinidumpSteamID:  Caching Steam ID:  76561198272228650 [API loaded no]
Destroyed Java VM ...

debug.txt:

Code:

Separator:/
UserDIR:/home/alex/.steam/steam/steamapps/common/Balrum
64bit Linux
Java: 1.7.0_79
Base: 2.9.3