We are planning to make a mobile version - but there's no exact timeframe. And it might be a totally different version from the Itch purchase.
You should request a refund from Itch if you want to return the game! No problem!
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. 2 years ago(+1)
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.