Thanks for the report. Well, at least there's something to look forward to every day!

(Not too many more days, I hope.) That "immersive mode" is already available in Moon+ in earlier Android versions, as long as you flip the pages with the volume button
only -- it's just too inconvenient. Also, you then need to tap the screen
twice to get to see Moon's toolbar -- whereas in KitKat, it should only be a single tap on the screen; that will definitely be nice and time-saving.