I'm proceeding to do a TAS of this game. I've encountered an interesting situation in my initial planning.
Tinstar was the first SNES game to allow the standard controller, mouse, or super scope to be used. In terms of cursor speed, the standard controller moves the slowest (even with the speed on highest). The mouse moves really fast, but unfortunately there is no way (or at least no easy/feasible way) to track its motion between frames. This makes it really difficult to see where you are aiming. The super scope is also incredibly fast since you can aim and shoot exactly where you want. However, there seems to be a snes9x bug with the super scope that has yet to be resolved. There is no pause button emulation. I read more about it
here.
Using the SS might be a possibility, but I'd have to be able to test it.
I'm proceeding currently to use the standard controller, which although it is the slowest of the 3, still moves pretty darn quick using frame advance. In fact, at my current rate, it might be WAY too tedious to try to play using the SS or mouse for input.