Hi, Linux user here (and a programmer), umm, it does not really start, the screen just flashes black, and then it stops. Look at the (probably not) helpful terminal output:
[jsmetana@beta RobinMorningwoodAdventure_Demo_2.0.4]$ time ./RobinMorningwoodAdventure_Demo_2.0.4.x86_64
Set current directory to /home/jsmetana/.local/share/RobinMorningwoodAdventure_Demo_2.0.4
Found path: /home/jsmetana/.local/share/RobinMorningwoodAdventure_Demo_2.0.4/RobinMorningwoodAdventure_Demo_2.0.4.x86_64
{EDIT: time output below}
real 0m0,892s
user 0m0,169s
sys 0m0,068s
Note: command 'time' just prints for how long the exec has run.
I can do more tests for you and provide you with more info, when I'll have time and remember this, just tell me what you need to know (if you're actually interested in fixing the Linux version).