I remember when you first posted about this on the forums several years ago when it was still work in progress, I looked at the results you had back then and was mostly unimpressed. Coupled with SNES Lemmings not being played much around here, having very few unique levels (compared to Genesis Lemmings for example), and me not particularly liking to play ports of Lemmings that don't support mouse, I did not feel motivated to say much about it. I figured given time if you are truly serious about it, you would eventually improve some of your results on your own, and if you are resourceful I would also expect you to cross-check with similar results we already reported here for DOS Lemmings.
Several years has passed. I guess some results have improved, but it looks like you haven't really cross-check with the DOS Lemmings results yet, and at the same time you seem to think you're close to maxing all levels. I think it's time you really compare with the DOS Lemmings results. There are definitely some differences that would make some particular results in DOS Lemmings not achievable and vice versa, but there's bound to be at least a few levels where a better result that was reported on DOS Lemmings would carry over to SNES. Even some of the glitches have been confirmed to work on SNES.
Regarding what Proxima mentioned about Fun, I had a chance to test some stuff out earlier today, but didn't have time to write this until now:
Fun 9: You used 2 skills, but this doesn't work on DOS.
This is expected. Amiga/SNES Lemmings' basher extends one pixel further forward, which is just enough to allow you to get through the column with 2 bashers.
Fun 11: You used 5 skills, our record is 3. This presumably relies on steel glitches. It's worth checking whether this works on SNES, because while glitches don't necessarily carry over, steel is pretty flimsy on most versions of the original game 
While the steel glitch itself actually works on SNES, the problem is that the DOS solution also relies on that version's bugged placement of one-way-wall trigger areas, which in DOS leads to a gap of no one-way-wall just above the steel floor (even though visually you see no gap), which is what lets you bash through the wrong way after digging 4 pixels down into the steel. This doesn't work in SNES.
There is also a 4 skill solution that is glitch-free, but surprisingly that also doesn't work in SNES, due to miner wackiness in SNES. (If you play the game it'd be very obvious, the floor of the mining tunnel doesn't look quite like the normal "2 pixels forward, 1 pixel down" steps you get in other ports.) Apparently it's not easy to mine down a build bridge with SNES's miner.
So unfortunately you might really need 5 skills for this on SNES.
Fun 13: I believe that on some versions, e.g. Genesis, this can be done with only 2 diggers. Not possible on SNES?
I tested this back when we talked about the use of "digger free digger" for this level on various ports. I'll link back to the post when I find it, but basically the problem is that it appears SNES doesn't let you increase the release rate fast enough to get the first 2 lemmings close enough together to do the trick. So you have to start the trick with the 2nd and 3rd lemmings instead, and hence need an extra digger to deal with the 1st lemming. On the Genesis it barely works and requires you to start increasing the release rate as soon as the game lets you (which is like during start of the fade-in before the level is even fully visible).
Fun 17: Our record is 4 skills (steel glitches again, although you also used steel glitches in your solution).
I distinctly remember having tested this on SNES and it should work. When I have time I'll record it in
Bizhawk emulator as confirmation.
Fun 23: Our record is 5 skills. From ccexplore's post, it sounds like this is bunching up the crowd so a single lemming can build over the gap, avoiding the need for the blocker.
Yes. Whether this solution works or not might hinge on whether certain changes in release rate is achievable on SNES, because the solution does rely on manipulating the release rate a little to bunch up the crowd almost perfectly into near-single position. That said, it could still work though even if a few lemmings are slightly off-position from the perfectly-compressed crowd, since the time window of danger (during the building over the gap) is relatively short compared to all that walking along the basher tunnel. You'll just have to test and see. I've included some key details in spoiler below. When I have time I'll try to confirm this solution on Bizhawk emulator.
Raise the release rate from 50 to 68 immediately after (not before!) 1st lemming comes out. 1st lemming digs at the bottom of the first tiny depression on the ground that it walks into. After 12th lemming comes out, lower release rate to 67. The digger keeps digging until only 2 pixels left before breaking through to bottom of level, as soon as 2 pixels left, start building to stop the digging. Now wait for rest of lemming to come out and fall into the digging pit. You end up with one single fairly tight bunch of lemmings. In my solution I started bashing left with a lemming that's almost at the right edge of the pit. I don't know if that matters but definitely be prepared to tweak the position you start bashing from, if the timing doesn't work out for you.
Fun 27: Our record is 5 skills. I don't know the details of this solution, but I'll see if I can find it and get back to you 
It was
my solution and I had the replay. Will make sure to restore it on the original challenge thread if it's missing there. [edit: done] It's not a conventional solution and uses steel glitches. The steel glitch might still work but the killer is difference in digging mechanics. Like in Fun 28, SNES doesn't let you continue dig down with so few pixels. From limited testing, I think you will need to shift the entire solution at least 2 pixels further left for the digger to be able to dig all the way down the right side of the steel block, but unfortunately this cause the build bridge to just miss the left edge of the exit platform.
Barring a completely different 5-skill solution to be discovered, 6 might indeed be the best you can do on SNES.
Fun 28: Our record is 10 skills. This is glitch-free and should definitely work on SNES.
Like MASTER-88 pointed out, SNES doesn't let you dig down the pole without being a bit closer to it, which ruins that solution. However, from limited testing I think there is a totally different way to handle the start that might enable a 10-skill solution. Will have to test more later tonight. Details below:
Dig down, then find a very precise spot to start mining left on. The goal is that you get a mining stroke that almost but does not break through the pole on the left, then on the next and final mining stroke, it also breaks through the floor so the miner and everyone else falls down to next holding area below. But if there was a lemming that already walked past the miner and was standing at where the pole was at during that final mining stroke, he should end up fall down past the pole and be able to end up safely outside, where he can do all the required building. You almost certainly have to manipulate the release rate to get the timing of the "lucky lemming" to work out, but it shouldn't require very precise changes to the release rate either (it might well be sufficient to just bump it up to 99 at some point).
Fun 29: Our record is 12 skills. I don't know the details of this solution.
This is also
mine and I'll fix the post to re-attach any missing replays [edit: nothing to fix]. It is a glitch-free solution but because it uses miners, I can't rule out being surprised unpleasantly by SNES, though in this case it seems very unlikely that the miner differences in SNES would actually affect the solution. So while it needs to be tested, I think it will work out. In the spoilers below I've listed out all the skills and roughly where they are used.
[edit: finally tested on SNES. So of course the SNES miner ruins things again.
Also, the part that uses the basher staircase trick apparently also fails due to the SNES basher taking out more pixels than DOS.
]
Block, then mine right to free blocker, then mine left with another lemming to stop the first miner and to reach the area left of the entrance area. Bash through next two obstacles. In the next area where there is a gap in the staircase, let the lemmings fall into the area below, then build left starting from the very right side to get out of it. Then use the basher staircase trick (bash, then build to stop the bashing mid-stroke) to get up to the piece of wood leading to the pyramid. At this point you can proceed same as your current solution (bash through pyramid, then 3 builders to reach exit).
