Monster Boy and The Cursed Kingdom is a game created by the developer behind Wonder Boy in Monster Land, Ryuichi Nishizawa. Monster Boy is essentially various retro gaming elements rolled into one unique side-scrolling game, with six playable characters to choose from. Each one of these characters sports a useful ability which will aid players in their journey. Once a character is unlocked, it can be used at any time, as seen in the trailer below.
https://youtu.be/wQ6DYSf5VNE
Monster Boy and The Cursed Kingdom is expected to launch on Mac, PC, PS4 and Xbox One, with a playable demo being available at the Xbox booth at Gamescom 2016.
Source: Youtube