Top-backroute: Skulls has a backroute by stretching 2 builders over the top, without help from any other skills. This backroute has become possible since 0.7 physics.
You have a spare miner and a spare cuber in the 0.9 top-backroute.
Skulls should be designed much clearer such that these things clearly fail (instead of barely fail or even barely work).
The 0.6 route in the first post's picture uses a miner, not an imploder.
I would really like this much clearer. Use platformers if builders become too fickle.
Intended route: I played Skulls with the intended route (build, implode, build over the top) and pushed this intended route to the replay collection. It's also attached. The collection had only a builder-stretching solution before. Probably intended replay failed around 2015-2017 and nobody replaced it with a working intended route.
Cut the spare cuber: Cubers 2->1.
geoo, please post this to the forum instead of dumping into IRC. These things are important. They get buried in IRC.
All-low backroute: Attached is a second backroute, found by Forestidia. This backroute doesn't send anyone over the top at all. The climbers break directly through the lower-right terrain.
Intended solution uses both cubers, see attachment for reference.
In this replay, you can save the final miner (A): It's enough to implode through the cube stack at the exit. I believe this was already possible in 0.6.
Killing workers with imploders is the central theme, and both such kills are not necessary since 0.6 or even earlier: The first builder can be cancelled with the miner that we save from (A).
Hmm. The imploders are powerful. I feel that the theme should be kept (it's really cute and unique) and the level should be redesigned around two such kills.