Your work is excellent, but I’d like to point out a few minor issues.
The image above compares the final stage of the game. Notice how the sky has an orange hue in the NEO GEO version, while in the arcade version, it is blue. A similar issue occurs in the castle room—the floor and walls in the arcade version have a grayish tone, whereas in the NEO GEO version, they once again have an orange hue. But regarding the castle, I might be wrong—it could just be differences in screen color adjustments.
Another issue I’d like to mention is that the axe, after defeating Death Adder, takes almost twice as long to fall on him.
I also want to reinforce a bug that occurs in the hardest difficulty level. I have reported it before but haven’t received a response, so I’m bringing it up again: the health bar does not appear in the hardest level if we skip the dialogue with Alex at the beginning of the game. The bar only reappears after taking a hit.
Lastly, I’d also like to reinforce the feather bug—the ink is appearing on top of the feather, which seems strange to me.
