-Allow me to disable the time limit. I get time over'd constantly in this game while trying to search for things.
-Give me a good level select.
-Allow playing as Tails to at least give you some kind of reward. I can understand why some achievements are disabled for Tails, but I can't have any of the extras unlocked from playing as him and I can't unlock a single achievement with him. The fact I can't even play as him in the time attack is also pretty irritating since I don't get a level select.
-Cleaner picture options. I don't understand why my emulator games should look sharper than this game. Nostalgia doesn't look bad, but playing Sonic CD on an emulator gives me a sharper picture.
-Customizable controls? Not everyone uses 360 emulation for their controllers.
I don't understand why none of these things were implemented. It doesn't seem I'm asking much to have these things implemented. I know I mentioned some of this in the past, but it really frustrated me just now when I wanted to play a certain level as Tails but couldn't so I felt like ranting.
Edit-
Is this game goddamn serious? There isn't time travel in time attack mode? Really? You know what would have been awesome? If you could unlock the ability to play any damn level starting at any time period. That would've been awesome.

