I was talking to somebody at Sonic BOOM in NYC about old Sonic flashes and this came up in the discussion. This is hugely nostalgic for me, and the action really holds up well. Especially in the later parts because you really need to pay attention to take it all in (that's how fast and flashy the fighting is).
Genius, sir. This series will never be duplicated. It's still one of my favorite sprite series - if not my favorite.