Nice work, I was able to find the Wild 13 and Havoc 11 solutions on my own once I saw your post.
Wild 1 was surprisingly straightforward
. At the time I wasn't really sure with only two entrances' worth of lemmings usable, whether it would be sufficient for a working nuke solution. Now in hindsight, I clearly had failed to realize that it's not at all the same as actually having only 30 lemmings, that in fact the timing (in terms of having lemmings explode as late as possible) is almost more like having, well, 60 lemmings.