It was a nice surprise to see this game again. The devotion of sonic fans knows no bounds haha.
Movement feels great. Good job with the animations.
Camera movement has improved greatly from last time. I had to adjust the camera speed a little but it felt good to use afterwards.
The only complaint is that grabbing and carrying keys is a bit cumbersome. I feel like it slows the gameplay down. Maybe you can simplify to just have keys be auto collect and auto use.
My other suggestion would be to have a tutorial area to show off the moves. Not everyone is a sonic player and it took me a while to remember that knuckles can wall climb and glide.
I also really like the whole playground vibe/open level structure. I like the freedom to choose which platforming challenge your want to tackle.
Overall, great job and want to see where you take this next.