Here's the intro to the game:
Hopefully this one does show up on iOS soon, particuarly in a premium incarnation. Of course, there's no guarantee since this isn't even being published by Sega, so it might be a project only meant for certain markets, but hey. I'm always down for more Sonic, being a long-suffering Sonic fan. Especially since who knows if we'll get Sonic Mania on mobile proper, instead of just the Switch...