Never tried this before - via Altirra.
Took me a short while to find the right settings:
Amazing conversion - seems 100% authentic. I did play the coin-op a lot, so it appears the same, even though I've only played one game and didn't get that far.
I guess this is the only way we'll ever see Galaga running. Must have been a lot of work to get this Moon Cresta up and running?
Yea, it's really well done. I watched a YouTube of the original - I remember it when new, but it's been so long since I played it...this is a very accurate version.
Have to say, I'm not loving Altirra though. I can't map the keys right on some games, and some I can't play. I much prefer the Atari800WinPlus, but obviously without VBXE, I couldn't play Moon Cresta.