I noticed a few things:
1. Animals no longer drop from robots we destroy. Not sure if it's intended, but if so, I hope you at least make it toggleable, because I like to see the little animals being freed, and dance around Sonic if we stop moving.
2. Not a bug, just something I wanted to point out. The main wall-jumping sound has changed, and I prefer the original one. By trying a few different wall-jumps, I stumbled upon the original sound. Can't replicate it, though. It happened only twice, and I got it by shear luck while trying many button combos. (I do think the sound only played while wall-jumping close to the ground, though.) I hope someone (either you, whenever you can, or someone else who has a good understanding of the mod) can make a comprehensive guide, for us to know how to make each wall-jump and hear each sound. Anyway, because of this, from time to time I like to play around with the 2.5 version, to listen to the OG sound, as well as to see the little animals pop out of the destroyed robots. Not really an issue, but I hope you can make it possible to choose the sounds, just like you made it possible to play as the Legacy SMS, I think that's the name. It has the original sound, but the wall-jump works in a completely different way. Not as fun.
Really love your mod, man, keep it up!