No releaserate manipulation need anymore. Just use climber, make sure its not turn back when you build to exit. He will otherwise climb over this tree and go to death. This solution was heck much easier, only hard timing is this bash under goal.

Saved two more than needed. But guess its intention solution

Easy level, guess its also intention solution

First i´ll aim goes lower route, but what ever i do its let me only save 34/35 and cannot got that setup correct. So let make it upper route, which was very easy and saved a lot more extra lemmings than we need. I´ll post replay both

cunning but quite fun level. 1 basher and 1 climber remain

One lemmings builds 4x to the right and then blocks.  While he's doing this, the crowd is restrained with a 3-builder stack on the left and a blocker on the first builder brick on the right. 

Now you need two trailblazers in order to do the two builders and blockers in the end, so the second-last lemming out of the entrance builds from the top of the 3-builder stack, such that both he and the last lemming out will get past the blocker.  One of them builds left 3x from a precise location.  With perfect timing, his second-last brick will touch the steel on the left just as the other lemming arrives, but it will be a pixel too low for him to step up, so he turns around.  Then the last brick will allow the builder to step up to the steel, which provides just enough separation between the two trailblazers to complete the bridge on the left (Screenshot 1).

The broken pillar is taken care of with a basher, two diggers, and a builder (although it can theoretically be done with just one digger, this is not strictly necessary).  This leaves two builders to place the blockers in the end.  Finally, the crowd can be released by bashing the step that the blocker is standing on.  The only lemmings lost are the initial ramp turner and the two blockers in the end (Screenshot 2).

Another easy level. Also two extra saved, its seems intention solution IMO

This might are massive backroute. That was really easy level, but guess i really break it

That was fun and interesting level, take while to solved, but sure one most interesting level here and not too hard to perform

Saved 5 extra lemmings than needed. Its might backroute, not sure about it. Yeah that not was very hard level, need little builder height

This might are another massive backroute. I saved all lemmings just left side exit. There is right exit, its seems pointless. Also Much skills remain, but no extra lemmings saved, though im not even attempt it

This Level was SUPER HARD Its also cunning, but this execution here was really hard task, tons releaserate manipulations and perfect timings, take a lot test replays and yeah some 3 hours to completed. I really turn the air blue when this fucking lizard trap at end ate my single lemmings into group and just let start build whole groups over agains, that was really piss off thing. Another very difficult task was that bash under exit. This spot have to pixel perfect, otherwise you ruin it at end, though i practice that a lot, so i failed it only once my real attempt. This not was bad level. Actually i liked it, because that was very genius and also very interesting level to play, but its might just more fun with little less precise things, but most those precise things here was necessary, i was really close find several little backroutes, but those road block rightbefore end. I´ll guess this is intention solution or at least close it.