One minor bit of feedback/request: maybe I'm too spoiled by code editors, but it would be nice to have a visual aid for identifying matching brackets -- maybe colorizing matching pairs ("rainbow brackets"), and/or a click-to-highlight feature that highlights the entire contents of a pair of braces for you. I felt like I was spending a lot of time trying to count bracket pairs, which made it hard to keep track of where I was in the puzzle and was less interesting than trying to solve the wordplay.