Revenge of the Lemmings - Level selection and ordering for v5

[Proxima]

Here's a first draft for what the first 20 levels of Picnic might look like. This is very rough, and I welcome all feedback for changes to the selection and ordering. Notes on my reasons for selecting each level, and any changes I've made:

1-1 9 ways to live: We agreed this was perfect as a first level.
1-2 Roadblock: From v2. Originally the blocker tutorial, repurposed as a 10-of-each.
1-3 It's a long, long way to fall: From v2.
1-4 Rise through the ranks: From v2, where it is the climber tutorial. Repeat of "A step too far" from Clammings (which I think is okay because I suggested a maximum of 5 levels from each of Mazu, Clam and I.S. could stay, and that was more because I wanted to keep those levels available for filling gaps like this, not because I want to keep the best five of each).
1-5 Lemmings on the Run: From Ben Bryant's pack, skillset changed to 10 of each. I shrunk the level to 160 pixels tall, which has meant that if the player lets the lemmings walk straight forward, they land on the rock instead of splatting; I think this is okay for such an early level.
1-6 Seeing red: From mobius's Outtakes collection.
1-7 The Small Jail: From v4. Should we cut out one group of lemmings?
1-8 Dig for Victory!: From v2, originally the digger tutorial. Placing it here makes it the trap introduction level (there is one in 1-5 but it's out of the way), and also means the first 10 levels include each tileset once.
1-9 Gotta Save 'em All!: From v2 and another Clam level. See above regarding tilesets.
1-10 Over or Under: From v4. Save requirement reduced to 15/20 (from 20/20) to make it more suitable for early placement; we could add a talisman for saving 20.
1-11 Through Fire and Flames: From v4. See above discussion for moving this later than its previous placement at 1-2.
1-12 In the cavern...: From v4.
1-13 Magnetic Area: From v4. Mobius didn't like this one much but I think it's an interesting way to get used to the mesh terrain and dealing with traps at RR 99.
1-14 Neighbors: From v4.
1-15 Somewhere Under the Rainbow: From v2. Easy repeat of Changing of the Guards. Since I haven't included Lemmington Spa (see below for why), I thought this could be a good replacement, as it has a similar "float down and build up" theme.
1-16 Nothing Gold Can Stay: From v4.
1-17 Let's Play Lemmings!: From v4.
1-18 The Fearsome Foursome: From v4.
1-19 Lem Dunk: From v4. Increased RR and lowered save requirement, since we can't use (NeoLemmix) RR below 50.
1-20 Minesweeper Lemmings: From v4.

The levels in v4's first 20 that are not included are:

Snowy Caves: Long and has more hazards, so it could come later in the rank.
Pipe Dream: Not sure about including this, but if we drop "Gotta Save 'em All!" this could replace it so we still have a bubble level in the first 10.
Lemmington Spa: Especially since we can only include five weirdybeardy levels, I favour keeping the original version of this rather than the 10-of-each version.
Surrealism: 10-of-each version is trivial. WillLem suggested making it 2-of-each, which is possible, but then it would come later.
Hedonist: Not sure about this one, still might include it.
Biosphere: Builder-heavy. Could still include it in the last 10.
Patience, Young Grasshopper: I need to solve the harder version before making a decision, and the 10-of-each version is not easy and would come later.
Himalayan Lemmings: Large and not very interesting.
Crystal Caves: I'm considering using the original (harder) version instead, in which case it would come later.