Yeah, PS1 doesn’t hold up all that great 🙁 FYI at Galdelico, the PS2 is not perfect in terms of backward compatibility. While it does have a PS1 CPU on board, it uses the PS2’s video output, so there are some issues in certain games. You can see this in the MLiG video on the PS1. For example, the moon on SotN doesn’t fade out properly on the PS2, some of the transparencies don’t seem to look right… it’s definitely better (visually) to play on PS1 if possible.
Side note, turns out I’ve also been using a PS2 cable with my PS1. Oops. Guess I need to order a new one :p