I have been playing the game for about 3 or 4 hours now, it looks like I am more than half way through the game which is... Kind of disappointing.
Nevertheless, credit goes where it is deserved. This is the best Sonic game in years, in fact I think it is the best Sonic spinoff since Sonic Pocket Adventure, and if we do not count handhelds then it is the best one since like... Sonic Chaos on the Master System.
There are some parts of the game where I was just really confused because the design was actually really good. Almost all of the levels have really good design and different kinds of platforms you can reach at all different kinds of angles, really strange for a Sonic Team game.
My only complaints come from I am just not really a fan of the overall style (it is not bad, I just do not really like it) and the controls being kind of wonky and needing a bit of polish, especially the double jump's arc and Classic Controller's horrible mapping.
It really bugs me how this is way more like a Kirby or Mario game than Sonic, but that does not really matter when the overall game is just designed very well and not a constant crapfest. There have been absolutely no sections where I have been mad at the game which has not happened to me in a Sonic game since like... Sonic Advance 1?
Certainly not the best 3D Sonic game... but it is great so far. At it's very worst it is still good. If whoever is reading this cannot decide between buying this game or Sonic the Hedgehog 4... Just get this and never look back, Sonic the Hedgehog 4 is garbage, this is great.
EDIT: I really hate the Sonic Simulator stuff, but I was grinning so hard when I saw Spring Yard Zone and Labyrinth Zone's maps recreated, especially because they do not tell you, only the biggest fans can tell which level is a remake and which is not.