From GameBrew - a wiki dedicated to Video Game Homebrew.
Dual strike came around as idea to see if it was possable for a player to control and work with both screens at the same time.
The end result of this is a cross between astroids and Ikaruga.
The player controls 2 ships at the same time, one on each screen. Each ship also has there own colour, 1 blue 1 red.
Each ship also fires bullets based on their colour. There are 3 colours of Astroids: blue, red and gray.
The play must shoot the right astroids with the right colours, this is done by allowing the ships to change screen. The ships are moved at the same time, but shooting it done by a per ship basis.
When a ship gets hit it will get knocked out of the game area, the ship will return after a short while. The game is lost when both ships are lost at the same time.
Left/Right - change direction of ship
Up - moves ship in direction
Y - shoots blue bullets
A - shoots Red bullets
L - switches ships