I think a lot of it has to do with the apk name file. I have been looking into this on the Play Store and seen apps with a title and the apk file having a name of something different but which would be good to search.
Mine for example is Paint Pot Lite and the apk file has paintpotlite in it. If you type that in paintpotlite it is the only app that comes up but if you type paint pot it isn't.
One title for a coloring book I saw was something like Kids Coloring Book but the apk name had littlepony in it and was at the top. I guess this is regarding the My Little Pony name helping it.
Have a look and see what you think.
@3d point in space, to say this was your first app, it is very good
Programming - AMOS on the AMIGA! / DBPro / Python / A bit of C C++ / now also AGK2! - Graphics - Deluxe Paint on the Amiga / Paintshop Pro / Photoshop / Lightroom / Grafx2
Previously worked for Prisma Software producing childrens educational software on the Amiga - Titles - Pepe's Garden - Paint Pot / Kids Academy range - Paint Pot II / Shopping Basket / Which Where What? / Blobs / Alvin's Puzzles