Is there hope to see an NTSC option?
Viewing post in Aonic: The Green Hill Zone Demo comments
It's a tricky one, as it's not necessarily the win you'd expect. As the Amiga uses 200 vertical lines in NTSC we'd lose more of the screen. (Sonic is 224 pixels tall).
Additionally, the HUD adds a further ~16 pixels to that height and is deliberately not overlaid over the game area.
So whilst technically you'd get a faster game on NTSC, you'd also be chopping more screen area which wouldn't be great.
On a pure fast ram setup, I'm more confident that you could easily overlay the HUD with with transparency - at least then you'd only lose the 24 pixels not 24+16. But that's a bit of a side-quest, whilst I still have so much of the game to work on remaining :-)