It's 2001: A Snake Odyssey, with a remake of Snake but with 360 degree movement. You fly around the Earth in the solar system, however if you crash or go too far out then you will die. The Earth's gravitational field will also have an effect on your movement.
To turn with mouse press the left or right mouse buttons. To turn with keyboard use either A or D, or the left or right arrow keys. You constantly move forward.