N Game.
N Game is a platformer that lets you play as a dude who has the athletic ability of a ninja and can do almost anything, but it's accompanied by a very short lifespan - like, 15-minute short. You need to finish a set amount of levels before your 15-minute timer goes down to 0, or you will die. You need to finish each level by pushing a button to open a door, and heading to that door to exit it. A lot of gold can also be scattered in each level, so getting them would be really helpful too.