Blast Off was released in Japan in 1989 and is the sequel to the space shooter Bosconian which was released in 1981. Created by Namco this game is pretty much the typical vertical space shooter in where it is you versus and army of enemies, however your ship is armed with some pretty badass weapons.
One thing that is a little different is your ship can switch weapons and while that in itself is not unique, what is, is the fact that dependent on the color of the laser you select you can shoot behind you.
Here is the weapon rundown:
The Red color features two lasers in a spiral pattern
The Blue color features one laser straight ahead, one behind
The Yellow color features one laser straight ahead, one left, and one right
The Green color features two lasers diagonally forward (one to the left and one to the right), and one straight behind.
In addition, you can hold down the fire button and the ship will fire off a powerful spherical laser. As you can see in the short video you have to have your twitch factor at a high level or you will die pretty quick, but honestly it is not as hard as some of the classic space shooters, I just suck that bad.