For anyone struggling with the speedruns I made this list of the levels so I'd know what to expect. WARNING! Major spoilers for the game.
Speedrun: Regular, Coin, Open, Break, Hint, Zoom, Spike, Patience, Death, Letters
Special: Regular, Backwards, Free, Mouse, Chase, Tunnel, Gravity, Snake, Left/Right, Invisible
Unfair: Enemy, Power Jumps, Disappear, Climb, Glide, Fall, Regular, Fast, Sink, Doors
(The hardest level in my opinion is Disappear, it takes me way more than half of my total time to finish it. If anyone had any tricks for getting through it easier that would be greatly appreciated.)