v2.00 of SEB Lems is now out, this is a very sharply updated version of the pack where a vast majority of levels have gone through backroute fixes, music track swaps and sweeping changes to prepare for the new format release (I made ceiling fixes for example).
I assume this pack has now been played by the majority of forum users so I have made fixes accordingly.
I worked on fixing this pack in the old formats while making preparations for the new format conversion so there will be features that are apparent of this like ceiling fixes. I felt it was easier to do it this way.
While I have tried very hard to make sure replays are preserved, there are a handful of levels where all of the replays will be broken so
be sure to check your replays for solvability after upgrading!Apologies for any inconvenience regarding broken replays, in the majority of cases it means your solution was a back route though.
This will be the
LAST update made to the old format of SEB Lems in any case. I am now entirely moving over to the NeoLemmix new formats and I will no longer be supporting this pack in old format and will move to work on the New Format version of SEB Lems. Feel free to still report any
functionality problems with the pack but it will be my decision whether I choose to fix them or not (most likely I will if it's something quick to fix though).
Download the nxp and v2.0 music pack in the first post of the topic

v2.00 changelog - this is a huge update so lots of information in here. Level swaps are further down in the spoiler tag.
Key - P = Paradise, B = Bittersweet, Rev = Revolution, S = Stormy, M = Murder, Rap = Rapture, MSB = MegSEBytes, U = Unrequited, DC = Deep Cuts
30 - One Way Arrows fixed.
30-MegSEByte Hard Drive - backroute by IchoTolot and Nessy fixed, ceiling added on upper-left.
99 Ways to Die - One Way Arrows added under trapdoor.
A Pirate's Life For Me - removed backroute by josh, changed music to PSP Crystal 3
A Tribute To Bob Holness - Talisman added: Save 58/60
Aaaahhhh Real Monsters - Time Limit 7:00 + back route fix.
Across the Wing Fortress Deck - Talisman removed.
Are You Really The Devil? - Added steel on hanging ball.
Aztec Dune Zone - -1 Digger -1 Stacker from skillset (Arty's solution enforced)
Back in the Saddle - Steel added, OWA added on train, -2 builders from skillset (Icho's solution enforced)
Being This Good Takes AGES - Talisman added: beat with only 6 platformers
Big Top Drop - Talisman added: Save 91 or more lemmings.
Birth of an Empire - Now Save 100%, Nessy's solution adopted.
Can You Hear Me? - back route fix
Can't Have It All - added steel column
Candy Floss Bonkers - back route fix
Circuit Breakers - Shortened middle platform, back route fix
Darkside Lightside - -1 Digger, Blocker now a pickup skill (backrouted by Arty and josh)
Digital Ice Age - One Way Arrows added
Don't Play With Fire - Talisman added: Save 100% (by Akseli)
Final Rush - changes to prevent backroutes
From A Designer's Perspective - Talisman: Save 42 Lemmings
Futuristic Climber Zone - Arty's backroute fixed.
Golden Round - Trapdoor moved to right slightly, steel and traps added to left of trapdoor, increase save requirement by 1 to 37.
Harvey Haddon Sports Pyramid - One Way Arrows added, ceiling doesn't need fixing.
Here Comes The Rapture - Steel added under "Death"
High Cube - Time Limit reduced to 1:45, One Way Arrows added
Hot For High Times - 3:00 Time Limit, Arty's solution adopted.
How Does It Feel? - IchoTolot's solution used, skillset drastically reduced, +1 to save requirement
I Feel Six and Twenty Eyes - Added Steel near Right hand trapdoor, to prevent stoner use under OWA (Arty and Nessy)
I'd Give You Anything - Level changed completely, no cloners, 1 fencer added, solution changed to prevent horrible backroutes.
I'd Never Make A Level About You - IchoTolot's solution adopted, -1 Basher from skillset, flamethrower over lava raised 1 pixel.
In Between Worlds - Steel added in top right section to stop top left being back routed.
Lemmings on the Stream - Talisman suggestion: Don't use the bomber. (Akseli and IchoTolot)
Lights, Camera, Action! - removed backroute by Arty, changed music to Metallic Madness Present
Mean Green Machine - removed 1 basher, adopted IchoTolot's solution
Meet Your Maker - removed 2 stackers, adopted Nessy's solution
Milly's Lair - removed the miner, fixed the "black pixel", adopted joshescue's solution
Mixed Up World - removed 2 bashers, adopted Nessy's solution
Mummies Alive! - backroutes by Arty and joshescue fixed
Never Let Me Down - added steel to ceiling above spike trap.
On The Dancefloor - removed 5 builders, adopted Akseli's solution
Rick-afinity - added One Way Arrows to Rick faces near exit.
Running Circles Around The Moon - back route fix, added spike trap from Snow tileset.
SEBpphires - backroute by Arty fixed, fixed ceiling on upper-left of level
Shoot From The Hip - Removed a Climber and Glider to enforce intended solution
SNAKE! - Release Rate now locked at 70 to increase difficulty.
That's Blockbusters - Talisman added: complete level without the Blocker (Nessy's solution)
The Call of Kyusu - Reduced Climber count by 1 (down to 8), adopted Nessy's solution
The Call of Lucia - Time limit reduced by 10 seconds
The Outbreak - backroute by Arty fixed, fixed ceiling on upper-right of level.
This is NOT a Drill - Time limit introduced 3 mins
Thought of Jigsaw and Made This - back route fix, heightened the left One Way Wall
Up and Down and All Around - backroutes by Arty, Icho, josh and Nessy fixed.
Level moves - please use this to update your replay files with the correct level numbers.
First code displayed is the level position in any version 1 of SEB Lems (since release) and the > points to where it has moved to in v2.00.
(format xx yy - where xx is rank number and yy is level number)
01 10 > 01 14
01 11 > 01 15
01 12 > 01 10
01 14 > 01 11
01 15 > 01 12
02 02 > 02 03
02 03 > 02 04
02 04 > 02 02
03 12 > 04 19 (up)
03 13 > 03 12
03 14 > 03 13
03 15 > 03 14
03 16 > 03 15
03 17 > 03 16
03 18 > 03 17
03 19 > 05 14 (up)
04 03 > 03 18 (down)
04 04 > 03 19 (down)
04 05 > 04 17
04 06 > 04 03
04 07 > 04 04
04 08 > 04 05
04 09 > 04 06
04 10 > 04 15
04 11 > 04 08
04 12 > 04 07
04 13 > 04 09
04 14 > 04 10
04 15 > 04 11
04 17 > 04 12
04 18 > 04 14
04 19 > 04 18
05 10 > 04 13 (down)
05 11 > 05 10
05 12 > 05 11
05 13 > 05 12
05 14 > 05 13
05 15 > 06 15 (up)
06 15 > 05 15 (down)
07 18 > 07 20
07 20 > 07 18
08 02 > 08 05
08 03 > 08 02
08 04 > 08 10
08 05 > 08 03
08 10 > 08 04
Rank 09 - no changes