A technical demo of a spaceship piloting game. This demo uses realistic thrusting and gravity physics and dynamically calculates proper gravitational fields so you can navigate around images of your design. Images with areas that are transparent (using alpha transparency) do not have any mass and so those areas are not used in the calculations. This allows you to orbit oddly shaped bodies realistically. You can orbit a moon or a cat-shaped moon and crash land on them! Use WASD keys to fire various thrusters while navigating images that you can choose. This demo was created using App Game Kit and is released into the public domain.