Alpha Attack Keyboard Game

Alpha Attack 101: – Kill Enemies by pressing the corresponding letter on the computer keyboard.
Hit Spacebar to drop a panic Bomb that will destroy all the enemies on the screen at once.
Kill Bonus letters to complete the words “LIFE” or “BOMB” and get, respectively, an extra life or an extra Panic Bomb.
Use the ” Pause or Break” Key to Pase the game.
Kill the Aliens as late as possible to get a higher Score.