Alright, let's start with the abilities you yourself made. The momentum thok isnt much to speak of, as it is simply a thok that's additive instead of a fixed high speed. But this wallslide and walljump stuff is VERY clumsy and awkward. Wallsliding happens automatcally, and USB Sonic will frequently slide onto any wall, no matter the height. I'm stepping down a stair and try to jump, and then I fly off into the corner! I never had these klutz issues with Mario.
It's also way too easy to walljump, as it automatically happens just by holding jump, creating this odd autofire scenario where I am bouncing off all the walls when I just wanted to get some extra height to get up a ledge, and now I'm somewhere else! It's also incredibly easy to jump in a wall at angles which stick you into the wall and let you rise directly up by holding jump, then all you can do is hold spin and a direction to hopefully disloge yourself. You can even activate this jump in situations where you really shouldn't, like while dying. I think wallsliding and walljumping is cool, but its really unpolished.
As for the other abilities, they seem reel tacked on, like many other Pick-and-Mix Sonic mods. If it wern't for the walljump stuff, I honestly would have rejected this Sonic mod like the others, as this seems more like a random collection of abilities and code, added together because you thought they'd be cool. The peelout doesnt mean much when a spindash and the momentum thok can easily get you to boost mode. And what in here from Xmomentum is necessary to be in here, when Xmomentum is a mod that applies to almost everyone, and still gets updated? Depending ont he code reused, you risk USB Sonic being incompatible or outdated in the future.
All in all, this is yet another Pick-and-Mix Sonic, but with the one somewhat unique ability to wallslide and walljump. Even so, you got quite a ways to go before this mod is really something special. As of right now, it meets release approval status, but not much else. I do hope you keep at it and polish the mod. It could be something neat in the future.