Alright, I finally had a proper go at these levels. I managed to solve all of them except Shadowrun; while I had a general idea here, the need to replay levels from the start (even with a replay feature - it still relies on you interrupting it at the right moment, and the fact it scrolls the screen automatically does not help) on Lemmini was driving me freaking crazy, so I gave up for now. Maybe I'm too used to Lemmix's fine control features...
Here's my replays for the four NeoLemmix ones.
My thoughts:
Precarious Construction (Part 2)
This is a really neat level. It took me a while to think of letting the last lemming past the blocker like that. I'd say this one took me the most time overall to solve.
Shadowrun
This seems like a really neat level; I have an idea of the overall solution but Lemmini makes it a pain in the ass to execute.
Careless Oasis
It does show off a neat trick - bouncing off one blocker to escape from between them - but overall, this level is very simple and quite bland, unfortunately.
General Tsao's Lemming
I'm fairly sure I backrouted this one. If not, that's a really clever trick with the miner by the exit.
Lost in Colourland
I'm almost sure I backrouted this one - while there's nothing that feels overly backroutey about it, I just get the feeling a level from Nepster is going to be a bit harder than this solution was. xD
Definitely some great levels here!