Avoid the creatures. Use the left and right arrow keys to move your spaceship left or right. Space bar shoots. You have to click flag twice to start Hit 25 before getting hit or letting 10 get by to win.
I used this for my Computer Aps class. I made this more like Galaxia. The ship only moves left and right. I added 3 more attackers that randomly pick 1 of 4 costumes. I made the missle faster. The attackers appear in random zones at random times and descend at random speeds. The attackers move straight down. Addded counters. Added moving stars.enjoy