These people are mobile game developers who teamed up with mobile game publishers to scam people. Not only was it delayed around four times, but the developers actively worked on another project and tried to use the hype of this game to get people to use their new product. Now with "unpaid volunteers" they were able to put together unity assets into a playable "game" to try to save face. They've abandoned every other project they've made, including a prior zombie game that was so bad, it doesn't even exist anymore. Their last game still cost around $25 dollars and includes gamebreaking bugs that'll never get fixed because it's been abandoned for years. Get your refund from these scam artists while you can.