Space Invaders

Towards the Earth, an unknown object is moving. All special units are alert and part is sent to explore the space. As you got to the spot, you found that there is several ships and thousands of aliens. The instructions are clear. Kill everything that moves and is not of human origin. Move fast and shoot precisely. Every target you miss can take your life and kill entire planet. Will you win the game and defeat their commander at the end of the game? Have fun.