Hello, I would like to play the game but could not figure out how to execute the file in debian system
I asked around for you and this is what I was told:
Mark file as executable (right click, permissions, mark as executable or chmod +x filename in terminal). And either double click the file or run ./filename.x86 from the terminal.
I can't check if it works, because I don't have Debian, so you'll have to try yourself.