As for design, I kinda love it.. I don't mind the first zone is basically the same art-wise. The others are looking different (the torch level looks great for example).
But for gameplay, I do mind this: "even just running to gain momentum is pointless when you can jump up and press jump again and boost to your top speed right away."
When you said that it made the spindash pointless I didn't agree. But I've see this here happen in some videos and I would like that to be changed until it comes out. Sonic could stop if you double jumped against the ground..
Still, in Sonic Adventures the same thing happened and most everyone simply ran normally at the beginning of levels anyway.
I won't be stubborn though. Everything I've been saying only makes sense if the homing attack works good (which I would bet it will), but if it doesn't I'll be sourly disappointed with the game and will take back all my speech.
I understand we have different opinions, but I do hope we both enjoy the game once it comes out