I had to look up Steve Russell's original Spacewar for some context, and there's definitely some interesting history there. It's also surprising to see that this port completely predates Asteroids.

This game is primarily a multiplayer duel, but there are some modes both multiplayer and singleplayer where the goal is to dodge stray squares flying around the screen. These might be fun, but I had more fun cheesing them by building up my ship's momentum to the point where it just clips through everything.