Hello, I didn't receive my premium keys, my email is email@example.com. I also have a question do I need to buy chapter 2 when I already buy the premium version because when I'm download the link again my game don't have chapter 2 :(
If you purchased it, then you should already have the download and just need to follow the instructions. The "product key" referred to is an extra, external key for Android/iPhone which are all gone, as they went to backers. But by purchasing the itch version, you already have the PC/Mac/Linux download. We suggest using the Itch app to manage downloads, but please let us know which system you are playing on as well.