crasyfingers lowered his time down to [16:24], so another 13 seconds gone.
Mostly this is due to better execution. Some of the improved strats though are as follows.
1-4: Nothing
5: Certain timing with blockers can improve a second or so.
6: correct timing of second explosion will keep a lemming from bouncing, saving a second.
7: (and applicable in other instances) cancelling or ending bridges via pickaxe is a couple frames faster for that specific lemming than ending one with bashers.
8: just bashing through without using any blockers saves a second.
9: not much except better timing cancelling out waiting for one more lemming to die.
10: using a blocker at start, then doing the climbing etc., than adding more blockers to continue bunching of lemmings.
11: new strats for bunching lemmings has improved a few seconds there.
12: impossible to improve
13: improved strats for bunching lemmings while bashing and building, and use of pickaxe.
14: small optimization with timing of events.
15: bunching lemmings closer to gate with multiple blockers. using 2 blockers at the beginning makes it basically impossible to destroy one blocker at the correct time without losing the bridge lemming.
16: big change here: instead of just bashing through with one lemming... make first lemming climb and bash where the column is shorter, than make others climb. saves a 5-6 seconds.
17: save a couple of seconds suiciding the last 5 lemmings.
18: better timing
19: better timing through use of bunching lemmings making it easier.
20: suicide the first two pick axes, then suiciding the third right before he uses his pickaxes saves a couple of seconds.
21: no improvements
22: pick axe improvement.
23: new strat is to pick axe first lemming, than use umbrellas; this results in quicker deaths and non releases for lemmings not needing to be saved.
24: this is the bulk of the improvement, and involves using climbers instead of bashers at the beginning to make the final portion easier to time and gets rid of lemmings not needed to beat level.
25: improved bunch and timing.
Hard to type the specific details on any given level, let alone all 25.