Need help ripping Android Games

[neonyoshi150]

I'm trying to rip sprites from the mobile games.  I extract the apps using Apk Extractor, ES File explorer to view on PC, go to the files containing the Apk files, and save it as a .zip. However, when looking through the .zip, I can't find anything that would have the sprites. I've tried several games (Onion hotel, KleptoCats, and Magikarp Jump,to name a few).  One of the games I tried, "Tape it Up! has a PAK file that I tried opening in 2 different PAK Openers: Leinen PAK Explorer and PAK Explorer but I'm told that they can't open the file. I'm very confused and would really appreciate the help.