Since you're here, I was curious about what you knew of the Atari 8-bit (Atari 800) ...tech demo? ...aborted conversion? ...fan creation?

It looks someone painfully down-converted a series of scenes from early in the game. The original sound seems completely thrown out. The system required trickery (usually hand-crafted) to gain more than 4 colors at once in high resolution. It's been a while since I looked at it, but I seem to recall the use of independently colored player-missile graphics (sprites) to bring more fidelity to the main character?

For reference: https://youtu.be/PCa_0nXvfDg?t=6