I'm not much of an artist but I think I make a great concept. The Tutorial Zone would take place in a virtual cyber space like level teaching the moves to the player before they start their "adventure". Each playable character has their own tutorial zone based around their moves.
I added two new tiles because I feel like this is pretty empty. I'm making a playable version based on this. I made the tiles for the ground, combined and edited the star post and time warp sign to make a custom star post. @chriser112 for the sonic sprite and of course Sega and Sonic team