Flying 2048 - Flying 2048... quite possibly the most "addicting" game in the world.
Limbo - “Dark, disturbing, yet eerily beautiful, Limbo is a world that deserves to be explored.” Joystiq. “Limbo is as close to perfect at what it does as a game can get.” Destructoid. Buy LIMBO: Special Edition.
Floculus Bird - Floculus Bird is a remake of Flappy Bird in 3D with Oculus Rift support. I made it in about five hours for Flappy Jam, a game jam organized by the indie community to show support for Dong Nguyen.
Super Meat Boy - Let's start with what's the same: Dr. Fetus is still a jerk, gameplay is super challenging but fair, there are tight controls and great levels and you will die. a lot.
Flappux - HTML based clone of Flappy Birds that is unapologetically free software.
Deadlight - 2016 TEQUILA WORKS, SL and published 2016 by Deep Silver, a division of Koch Media GmbH, Austria.