For linux you need the libraries SDL (version 1.1) and SDL_image, these are included in the windows version.
If you don't know how to install the game, see this section.
 

• no bugs (I hope :-)
• 800x600 mode only
• small size of the package (900 Kb)
• small size of the game installed (1,2 Mb)
• motion blur for the wings of the Do'SSis angels in the menu ... nice
• advice available during the game (good for learn computer's strategy)
• menu available at any time
• other things I don't remember ... ;-)

• help available
• indication of action to do
• menu during the game to quit, return to menu, restart the game
• dialog box for confirmation of exiting

• A.I. more intelligent
• return to menu instead of exit
• asking for confirmation at exit
• graphics bugs correction
• colored menu
• another option : meteorits rain
• help button (just the button :-)

• simple A.I.
• basic game play
• choice in the menu: double move, double fire, grid size, game speed, color of players and type (human or computer)