Struggling with Ripping from Android Game

Let me start by saying I've never ripped anything before and I am a total novice, so unfortunately, certain things go over my head.

I'm attempting to rip the sprites and various resources from a mobile game that was recently released and for the life of me, I can't figure it out.

I'm working with an Android game and managed to extract the APK and converted it into a .zip, but it doesn't seem to have the resources I'm looking for. I'm using BlueStacks and ES File Explorer. The game in question is Negimate.

Any help would be very appreciated.