Your favourite side-scrolling puzzle/platformer

Hey all,

I want to know your favourite side-scrolling platformer games. I just have to dig them, and I felt like I've missed so many platformers recently like LIMBO, and decided to check them one by one. I played many Mario, Sonic, Zelda, Castlevania, Mega Man, Sonic, Kirby games, but I am not in a search for them.. I want puzzle, maybe an inovation (like Shift or Closure), and hoping that you understand me.

LIMBO, Braid, Beat Sneak Bandit (iOS) are great ones.

My English is not that much good, a bit rusty on talking, sorry for that. I'm looking forward to your answers!

Hugs,
Emir