Well, I haven't played this game a lot but I have som tips anyway:
1. Be accurate with your shooting. Since there is A LOT of shooting going on in this game you'd normally miss a lot of shots. However, in a TAS, make sure you hit with EVERY shot, unless it's, for some reason, really entertaining to do otherwise.
2. I don't know if this is possible, but it would be cool if you had 100% kills. As long as this doesn't waste to much time that is.
And here are some general tips when making a Tool-assisteed speedrun:
* Make sure you have read the
rules.
* Reading the
guidelines helps out a lot too.
* Try out what happens when you press left+right at the same time. You got to have
nitsuja's improved SNES9X emulator to do this.
And a general tips that I've found out is this: Use frame advance, with the frame counter on, rather than using regular slowdown. This way you can have 100% accuracy as to when you should fire and so on.
Oh, and use savestates a lot too :)
Other than that I wish you good luck with this game, it could be really entertaining to watch a run if it's well done.