Astro Ninja Man DX

The cost of overcoming the threat of the destruction of the earth with chemical power was an environmental change of 100 times the gravity.
The strong gravity attracts invaders from outer space.
Astro Ninja Man is the last hope for mankind.

This is an expanded version of Astro Ninja Man, that includes a new game mode ("Quick Game") where players have three minutes in a special stage (with new music by Nobuyuki Shioda) to earn the highest score.