Beautiful showcase of an essential optimization Aside from the start, this level doesn't have interesting choices; it's solidly built, but unfortunately not very interesting Very odd, very tricky to break through - though not hard to optimize, this is a good puzzle It's a shame there are so many 55s and no interesting ways to pipe A great classic level that challenges what you know about breaking through structures - there's rich logic here Great structures! It was enjoyable even as I was able to find the trick right away, and the optimization is interesting as well. It's a decent crucible-like level; I had to think a bit to find optimal, though it did only take one attempt. Quite an unexpected solution! 
Insights