Sanus is right. The fact that this is Sonic 4 is somewhat of a disgrace. The whole thing seems to be just slapped together. Only 4 zones? And Ken mentioned they would be charging up to $25 for this!
The physics are still a major problem. You can't really use those positive E3 previews as an argument because they weren't analyzing the game when they played it. They just saw Sonic running on a 2D plane and immediately declared it great. GoNintnedo's preview made more sense. Physics are extremely important for a game like Sonic.
That, and it seems to be a step down from Sonic 3 & Knuckles. (No mini-boss, no elemental shields, no Act transitions, etc.) Also, what's with the reused bosses and level art???
It's a shame, because I like just about everything else. I like the graphics, I love how the music is using those Sonic 1/2 drum samples, and I think the level design is really good. I don't even have a problem with the homing attack!
But those wonky physics drag it all down.
I really really REALLY hope they can get the physics right before release. Hell, JUST USE THE SONIC ADVANCE PHYSICS ENGINE! It's right there under their noses, and damn near close to the Genesis games. I don't understand why they wont use it....