The game - Kagerou Densetsu - Dendy | NES

Semi-adventure toy. The usual game mode is a top view, a small but sufficiently detailed boy runs along the paths of the big world. Occasionally he is attacked by ninjas, and then the game switches to combat mode with a side view, when you need to swing your sword faster to kill an equally slow opponent. When a boy dies, a girl with a ponytail takes his place.