Update: V5.0, see first post for download (attachment).
Changes: landscape change in Tricky 3 "The L-team" (to fix
Swerdis' backroute)

Here's a gap now
Edit:
Update: V5.1Changes: landscape change in Mayhem 6 "Jolly Jumpers"

Here's a trap now
Edit 2:
Update: V5.2Changes: landscape change in Bonus 2 "Working Lem Blues"

I removed a steel block here
Edit 3:
Update: V5.3Changes: landscape change in Bonus 5 "All the Good Lems go to Hell"
I fixed
this backroute by kaywhyn by adding some fire.