Are you aware of a game called Hiker: Heropack Creed? I found it on the google play store and it genuinely looks like 95% of it was ripped straight from Backpack Hero and the 5% are all minor visual and UI differences.
I just went to the app store and started to file a report against it, but apparently that's only acceptable from Backpack Hero's own devs or someone legally endowed to act on their behalf.
I don't know how else to bring this to Google's attention. Google seriously needs to update their app store's reporting functions to include concerned folk who hate seeing good work ripped off.