I'm really enjoying the game so far! It feels like a true sequel to S3&K, and somewhat of a send-off to the Classics considering the amount of references to older titles. Really loved how Volcano Valley, Green Grove and Rusty Ruin turned out, and especially liked Gene Gadget's Act 1 Boss.
But the fight can get kinda chaotic bc Black Metal spams a lot of Air Dashes, especially when another Metal decides to join.
And the Special Stages are kinda bad. Sonic controls are way too fast and the Bombs/Rings spawn way too quickly, making it kinda hard to either dodge or collect, especially on curves. I had to try like 6 times i think to get ONE Chaos Emerald. I get that they're supposed to be difficult, but i think it's a bit much. It makes me want to avoid them but i'd be missing out the extra zone at the end and it just makes it more annoying.
Also i LOVED how you pulled off really difficult bosses, i've enjoyed them all. Shoutouts to Spring Stadium 1 and Diamond Dust 1. The one that really bugged me tho, is Rusty Ruin's second boss, it's super easy.
Btw i got soft-locked in Gene Gadget 2 after jumping over a Dash Pad, the one that sends you up before the platform section that leads to the Electric door. Sonic just got stuck looking up in the ramp and i had to reset.