I think that the IGNorant reviewers have not been playing the game the right way.
Yes its sonic and you expect to run all the time, but this one you really should not hold down the run button on the platforming bits and it plays perfectly fine. I think they have had the R button held down the whole time with makes the difficult sections much harder to control. Just use the Fast sprint in open straight sections.
The game has its faults, but it really is allot of fun and deserves a higher score .