Thanks. I'm getting excited (Ashamed on my mistake thinking that Frost 15 was impossible
)! My sequel project will be unlocked in just a couple of moments and you can post. Now we have Hail to do and we're done! I've done Hail 15 and that was pretty similar to Tricky 26 of original lemmings. Here are the Hail levels which are unsolvable with a release rate of 99 so far.
Hail 5: Get the point?*
Hail 7: Steel ice span
Hail 9: Up, up and away.
Hail 12: Merry Christmaze
Hail 16: Peak of performance
*This is the one which is impossible. I'm sure Hail 16 is highly doubtful as well.