One thing that always surprises me about this game is that it was made in 1982. You wouldn't think it, though. The reason is the graphics look quite good. Compared to say the VIC-20 version the graphics on this version are relatively smooth. They move left or right in a sort of pixel-controlled way, not just blocky. Similarly when they go up and down, the ship and the alients, but the ship in particular. You notice the movement of the ship in the up-down direction to be smooth. It is not jerky. There almost seems to be some thrust element thrown in, but I don't know, this maybe my imagination. One feature that is ahead of the pack, specially since this game came out when Micro computers were unknown and Atari 2600's ruled, is that there is some 3D thrown in: i mean green/red colouring. Don't know if this is meant to be that way, but the spaceship changes to red and green when it thrusts or doesn't thrust respectively. The effect is still quite noticeable.
