How do I hack levels in most games?

[lostinthemgs]

So I just got into this, and I've dumped the files and searched for levels. I can't seem to find a tutorial on what I should be looking for/at. Would love to learn how to do this kind of thing on my own. 

The current game I'm looking for cheating the levels is https://play.google.com/store/apps/details?id=com.spcomes.pspy