Shinobi: Art of vengeance. It is a 2D brawler with stages that end with a boss, but they have metroidvania elements to add value for replaying them. It is about 10 hours to go start to finish while doing a lot of the back tracking stuff. Simple story but incredible combat and good level design(only one level I thought was a bit meh), the art and animations are fantastic as well. Very much a new take on the old games, and has a demo to try as well.