Great classic shooter
You can play single or solo, which makes for a good game. Dual play allows for you to survive a little longer because you have someone to watch your back. The graphics are pretty good for an NES game and the sound is decent too. As I said with simple controls, you get used to the feel of the game quickly, but have to master the jumping and changing levels in each stage. Getting the powerups helps a lot because you get wide-spread or homing ammo.
Quite a good game!