'Orbiter' is a small game I created to practice writing physics in ActionScript 2.0. In the game, the user must adjust the position and speed settings of a spaceship. The goal is to navigate the ship past planets and to the other side of the screen. The planets exert a gravitational pull on the ship as it passes by them, affecting the ship's trajectory. Gravitational force and range of effect is based upon each planet's diameter. The game is five levels, with a bonus level at the end. Note the instructions on the bonus level, as the rules for winning change. Enjoy!