I can see the potential for this project, however my main gripe with it is it's feeling of speed. There are a lot of interesting Sonic-like things but Sonic himself, as well as the stage, feels slow. The 2nd and 3rd stages were good to play in anyway. Also my controller didn't work, so it took some time to adjust to new controls on the keyboard and mouse. Considering the initial Bumper Engine was all about speed and has shown amazing results (ex. Sonic GT), I hope to see the same for this one.
Changing speed is as simple as increasing a few variables. My main focus was on adjusting the framework itself so balance as a game got thrown to the wayside, sorry about that.
Also, if you downloaded the build from September 2nd onwards the controller issue should have been fixed.
Thanks for the review, I'll be focussing more on the framework for the next release but if I have time I'll balance the levels and demo physics too.