If you don't feel comfortable posting that information on the forum, you can also contact our support: https://support.gog.com
I've submitted log and report via link you've provided. Thank you.
Do you have managed to fix it by now?
GOG support wrote me this but it didn't help, so I just contacted FreeLives' support.
1) Make sure you are running the latest version of the game. You may need to download it again from your GOG library: https://www.gog.com/account
2) Please update your graphics device drivers.
3) Uninstall the game and reinstall it to the default directory, proposed by the installer. DO NOT UNDER ANY CIRCUMSTANCES USE A ROOT TERMINAL OR THE SUDO COMMAND TO RUN THE INSTALLER.
(To uninstall the game, use the uninstall script from the game's installation folder, located by default in '~/GOG Games/<your game>' - double-click it in your usual files browser, or start it from a command line with ./uninstall-<your game>.sh .)
4) Please go to the game's options file (default: <path-to-game>\Saves\Options.xml). Open Options.xml file using text editor and change these values to:
Save the file and start the game.
If above steps didn't resolved your issue, then please contact official support since they should know more about this issue: