Instructions are simple; Click 'Play' to load up the game (wait for the loading screen to finish) and once Earth has counted down til' it says "Shoot em' up!" you can then move with the Left and Right arrow keys whilst being able to shoot laser bullets with the Space bar. Objective is to destroy all the Invaders before time runs out. If there is ANY Invaders remaining when the timer runs out, you die, but if ALL Invaders are destroyed before the timer runs out, wait for the remaining time to go down to 0 to get praised for your victory!