Moon+ reader pro idiot guide please

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http://www.mobileread.com – When it works its fine but I'm having a number of problems on a Google Nexus 7. First sometimes I get the splash page at the start of a book and I've no idea how to get to the first page or anywhere else. Extremely frustrating at times then magically the first page appears. I like white lettering on a black background but unfortunately I sometimes get a background image that I can't see how to turn off. I read there are "24 customized operations (screen click, swipe gesture" what are they? Again an element of frustration here. How you tell it you've finished the book an (HowTos)