No help? Obvious controls missing! – Edhita: Text Editor Review

So I installed this because I was looking for a plain text editor. I created a file and started typing. There is no "save" button in the UI that I could tell. I started to traverse down the directory tree but I couldn't find a way traverse back up. So I really don't know if my text file was saved or not and I'm not sure if I can find it and edit it again. There must be a way to do this (I assume) but I could not find anything. How could there be so many good reviews for this app when some obvious controls appear to be missing? Or did I miss the point of this app altogether?
Review by And.or.not on Edhita: Text Editor.