Neat project! Thanks for sharing!
"broot" also lives in this space, but is rapidly getting too complex for me to memorize without consulting the help page.
+1 for broot[1], it works so fast and can be used even to fuzzy search sub-sub-directories. I'm also bit lost on the features but the help is quite good and mostly I use it just to find a directory and enter it, which requires only one keyboard shortcut.