The game never starts on Debian GNU/Linux 8.1 x64
The start.sh script returns:

Running Race The Sun
Set current directory to /home/martin/bin/Race The Sun/game
Found path: /home/martin/bin/Race The Sun/game/RaceTheSun.x86
Mono path[0] = '/home/martin/bin/Race The Sun/game/RaceTheSun_Data/Managed'
Mono path[1] = '/home/martin/bin/Race The Sun/game/RaceTheSun_Data/Mono'
Mono config path = '/home/martin/bin/Race The Sun/game/RaceTheSun_Data/Mono/etc'
support/gog_com.shlib: Zeile 94: 6500 Abgebrochen ./"${bin_64}"

Could be an XFS related bug. Try the latest update.