starfield background

The original spacewar had a starfield background that helped users to perceive motion even when the ships were moving very slowly against that background.

Start by locating the game's rendering entry point and reviewing how the play area and ship movement are drawn. The issue provides no file or test references, so determine the appropriate rendering location and how a starfield should behave. Done means the background makes slow ship movement perceptible without obscuring gameplay.

Written by the indexing model from the issue text.