太空大战源代码，在matlab上运行，代码无错误，可直接运行。
%GALACTIC Galactic game
%
% To play this game, type: GALACTIC
%
% Controls:
% Mouse Control ship
% Left click Shoot
% Ctrl+P Pause
%
% During the game, use the game menu to set difficulty and to
% enable/disable sound ef
