Someone mentioned the Space Invaders "double shot" trick (hold down the Game Reset switch while turning the power on, to allow 2 shots on-screen at once) in the Poll of the Week thread, and it got me thinking again about this.   Does anyone know whether this is actually a bug or if it was deliberately programmed into the game? It seems like an odd kind of bug, so I always have assumed that it was done that way on purpose.   Also... as someone who doesn't really know about 2600 programming,