Levels without a comment are solved as intended or an otherwise good alternative
Level 4 - This is very similar to skill requirement I was originally thinking of using - I ended up giving a few more options for containing the crowd given its early placement. Nice solve!
Level 9 - Your 2nd replay on this is the intended one, the first solution was really nice too. I could 'fix' the first one with a button but I think this is certainly clever enough to keep! I am considering a talisman for this, but also am a bit worried that showing the talisman requirement might narrow the solution space too much.
Level 13 - I really thought I had fixed this by moving the entrance close enough to make the builders turn, but I didn't anticipate that blocker
Level 14 - This wasn't really intended but is advanced enough that it might actually be harder than the intended solve. I did tweak this level to fix sneaking under the one way wall.
Level 15 - This is a bacrkoute & I was worried this level would have something I was missing. I have made a small adjustment to the bottle the basher was able to continue into - this is relatively small change that hopefully fixes this level though!
Level 16 - This used all the skills so I was intially inclined to keep this as the solution was certainly good. But, since i was making changes I have moved the first building down a bit...
Level 17 - This is a backroute which should be fixed now
Level 18 - I have slightly adjusted the last bit of the level around the bricks - it doesn't make the level any harder or change the solution much, but I just like the way it finishes a bit more.
Extra 2 - I have hopefully fixed this with a bit of steel
Extra 6 - Really nice solution! This isn't what I had intended but this is certainly a creative solution.