So I played through the entire thing, it was pretty alright overall. I sadly don't remember much from the experience because, even though this may come out as harsh, barely anything was memorable.
I enjoyed Haunted Manor and the last few levels since they had some more quality and length into them, everything else felt short or empty, often both. (EDIT: I know that they're old ports and all, but that doesn't really excuse it to me*)
I also got all 7 emeralds, and the last special stage was pretty brutal, but manageable. You might wanna do something about the old special stage timer being active in NiGHTS special stages however.
The Minus boss at the end was kinda cool actually, though the time window to hit it seems pretty insuficient even for Sonic, so I don't even know how Tails would manage, and the little things it throws should vanish after some time because they end up getting annoying as you can't get near the boss without getting your behind drilled upon, and obnoxiously loud after a while (the minus' digging sound makes me feel insecure, I need an adult).
Also for the love of god PLEASE... Don't use midi musics, they just uncontrollably explode my ears and I end up having to mute it entierely, I don't know if that's the case for anyone else here, but the lack of volume control on them is a huge problem to me.