It's not too bad for a fan-game I guess. Looks like something I could play once or twice.

"Unfocused" really defines Sega's modern Sonic development career.  Shame cause they have had good ideas that they don't let simmer.  Adventure 1's Sonic gameplay could have been refined to something great, but instead they did more alternative gameplay styles in the next game. 

Sonic Generations is actually pretty excellent, but then they tossed the boost gameplay for Sonic Lost World which had good ideas but screw that noise, time for another redesign...it's just a mess.

I played the demo, it's pretty solid. It tries to capitalize on the essence that was the Sonic CD/Sonic Boom (CD) intro animation, in which the world is vast, there's tons of ramps, and huge emphasis on speed. It's also a very beautiful game. I thoroughly enjoyed it.

Well, from the looks of Project Sonic 2017, they're going back to the Boost Formula they perfected with Generations, I think so because they specificaly mentioned "From the makes of Sonic Colors and Sonic Generations" And seeing as how we have not had a mainline 3D Sonic game since Lost World, tells me that they actually are letting it simmer this time. So we'll see.