Mission Arcade Alpha

Mission Arcade Your mission: clear the comet field.  Thrust the ship forward, backward, or to its left or right (WASD or gamepad left stick).  Use gyros to rotate it (left-right arrows or gamepad right stick horizontal), and fire missiles at the comets (space bar or gamepad right trigger). Your mission: stop the intrusion force.  Thrust the ship left and right (A,  D or gamepad left stick) and fir…