So if I can just figure out what Gyruss is about:
You're a ship in 22XX or whatever and you're a space plane trying to stop an astronomically large red elf from wearing the Earth around his neck. As it turns out, the main villain is nowhere to be seen once you get to Earth and your destination is the Sun instead, which is the final boss, but it's a giant eyeball in disguise, and the real sun comes out of [tornado fang]ing nowhere once you defeat it, and then the message "THE UNIVERSE IS AT PEACE" appears, so it seems that at that time, the solar system is all that's left of the universe.
Yeah, I think I got it. Meanwhile, I'm still playing ping-pong to the death with Homer Simpson's face.