Shadow of the Ninja (1990)

Shadow of the Ninja, originally released in Japan as Yami no Shigotonin Kage (闇の仕事人 KAGE, The Darkness Worker Kage) and later released in Europe and Australia as Blue Shadow, is a side-scrolling action game developed by Natsume for the Nintendo Entertainment System (NES) in 1990.
It's the year 2029 A.D. and a madman controls the largest city in America. When reports have reached the Emperor Garuda, he feels an inner chill, for he knows the invaders are Ninja!