Legend of Kage, The

One of the simplest action games on the NES. A tiny ninja runs around a monotonous location (from right to left, for some reason), beating up similarly tiny enemies that pop up everywhere. The locations are so long that they seem endless. But in fact it is still possible to run to the end of the level. And if you don't die from enemy contact, you'll find that the game is very short, you can complete it in fifteen minutes. And once you've done it... that's right, the game starts again. It's that kind of eight-bit action.