Thanks to you for answer...
First , the file FXL is not executable.... You have to manually change its attribute, whit chmod +x ./FXL
then you can run it... But on my ubuntu 12.04 in the terminal it gives me error complaining about a too old libstdc++... may be ubuntu 12.04 is old for this game. I think i've to buy the steam version, hoping it's linked against steam runtime....
No bundled steam key whit my purchase??? :D :D