Aliens want to invade planet Earth! It's your mission to stop them! Use the arrow keys to move. Press space to fire. Press A to turn Auto-fire on/off. Shoot the aliens before they get to Earth! The counter at the bottom shows how many aliens you have let onto planet Earth. When the counter gets to 5....... The Aliens invade planet Earth and you lose the game. Update V1.6 Added a global high score. When you make a high score, it says 'You made a global high score, <username>, Congratulations! Update V1.5 Fixed the scoring system. Added the backdrop that says 'Aliens have invaded planet Earth' Fixed some bugs/glitches Update V 1.4 Added lives. Update V 1.3 Changed the bullets so they fade into outer space, and they don't have that long a range. So, you can't shoot the alien ships as they appear from the far left of the screen, because your bullets won't travel that far. Update: V 1.2 The alien's spaceships explode when you shoot them, rather that vanishing. Update: V1 Added bullets to shoot.
Still unfinished. Plan to make the aliens shoot, and more. If you find a glitch, or have a way of improving the game, please post in the comments. Thanks to @mario64fan for providing the code to make the movement of the spaceship smoother. If you make a high score, post in the comments so I can change where it says 'High Score By:' to your name.
