Fourtissimo: Glaring backroute.
Five do not survive: It seems that I have to remove the batter. Adding it to require less timing was probably not a good idea.
Construction zone: Backroute due to different digger behavior.
Tomb Raider: Backroute due to slight terrain changes.
Minimalistic Platforms: I already checked this approach, but appearently not in enough details - backroute.
Toy Ship: Slight variation of the intended solution.
Cubism: Again a glaring backroute due to subtly different terrain widths.
Death of a Working Lix: Backroute. I never even considered this approach and was simply fortunate in the NeoLemmix version.
Choir of the Mad: That is a very embarrassing backroute
Canonballs: The left-hand side is totally fine, but I will block the way you did the right-hand side.
No matter what I try: Very interesting solution and completely different to mine. I have not yet decided what to do with it.
Minor Obstacles: This is truly embarrassing, because I gave you floaters where you should have none...
Marble Temple: Again a backroute introduced by subtle terrain changes combined with less strict terrain checks for builders.
Chinese Lemmings: Essentially the intended solution.
Ugly Bricks: This is an open-ended level, but your solution feels slightly too easy...
Hope and Despair: Intended.
Icy Smell of Steel: Glaring backroute to both the Lix and the NeoLemmix version. Given that a lot of people found other much harder (and acceptable) solutions this is quite surprising.
Broken Symmetry: Again subtle changes in the terrain made this backroute possible.
Woodworms: Intended.
Lament of Innocence: Acceptable alternative solution, that was already found for the NeoLemmix version.
Divide & Conquer: Backroute, but given the huge amount of backroutes for the NeoLemmix version, this is not surprising.
Advanced Earth Cube: Backroute, due to a slightly thinner gap to bridge.
Builders Prohibited: Another backroute, this time caused by my changes to allow for fixed SI.
Heart for Lix: I tried this backrouty approach, but couldn't make it work myself. Thanks for showing my that it is still possible.
Edge of Death: Same here.
Magic Wings: Oh, this is very bad! Now I have to adapt all my levels with one-way-gadgets...
Fall and Never Live: Totally my fault. This backroute was already found for NeoLemmix, but only after I converted the level. Then I forgot to fix the Lix version.