I loved this game, it's far from perfect tho. It feels like an experimental game wich I don't consider a bad thing. I felt like they threw every Idea they had into the game and a lot of them worked wich is great.
It was such a fun and enjoyable experience, the game really does a wonderfull job making you feel like sonic. The cyberspace levels were fine, some were great and some were just there, I would love some new "maps" and themes for those tho.
The bosses in this game were so badass and epic wich contributed to making the final boss feel SUPER underwhelming and anti climatic.
Overall I believe this game was an awesome and fun prototype for an even bigger game, just hope they learn from this and try to improve it!