Shouldn't Sonic be bouncing off of enemies he jumps into? It looks like he's just ramming through them.
Sonic's getting too fat nowadays, this might be the reason he ends up going on a diet later.
Seriously tho, this looks super un-floaty. I'm not sure if that's a good thing or a bad thing since, you know, I haven't played it yet, but it's definitely way different than Generations. Are the physics closer or even farther away from the classic games. Regardless, Sonic has the Drop Dash from Sonic Mania in this (although, chances are the Mania developers got to see Sonic Team's work on Forces before starting Mania and decided to use the Drop Dash because they liked it or some kind of version of similar events), which is nice.
I'll leave level design analysis to others, but as far as visuals and music: the engine looks great and I'm looking forward to seeing other stages, the visuals of this stage are nice but fairly safe (it is GHZ after all), and the music is inoffensively decent. Not blown away by anything yet, but I feel like this is supposed to be a super short tutorial stage that leads into the opening cutscene, so I'm hoping the other stages are going to be amazing.