As predicted I could'nt install it on 5.3.1
I updated on
5.3.4, it launchs fine (thanks knc1).
So here is my feedback :
-I made screenshots (the first ones) to show you few size issues (menus too shorts, and bottom text in settings a little too big

)
-(sound option is useless on pw, because there is no sound at all)
I did not use the readingJS you send. I used the original one, the taps I make on the screen are not read as taps by komic but as scroll (up and down).
(scroll in the 7 screenshot)
What is I think happening :
-When I tap, it sees a scroll and then scroll for about 1mm or less (up and down scroll).
-You need to tap a lot to change the page/access the menu.
Solution that I can think of :
-disable up/down scroll : I resize all my comics to 758x1024 this way they are fullscreen and I only need to zoom if the font are too small but the screen is usually big enough.
OR
-increase the scroll detection press time to detect taps quicker and scroll longer.
The deletion works fine.
I did not try the other scripts (remove borders and decompress cbr/cbz, I think they work just fine because they don't depend on GUI).
I hope it will help you correct some issues. I will continue testing (try the readingJS for example and use the other scripts).