Best use 7zip program or similar to extract the files. Windows extracting tool is very basic . OR download itch.io app and use that to get the game.
I tried downloading the app from the website, and it didn't seem to want to work either.... :c
"C:\Users\Connor\AppData\Local\Packages\Microsoft.MicrosoftEdge.8wekyb3d8bbwe\TempState\Downloads\my-little-blacksmith-shop-win\MyLittleBlacksmithShop_Win64_Alpha_02\WindowsNoEditor\Engine\Binaries\Win64\UE4Game-Win64-Shipping.exe" ..\..\..\ShopSim\ShopSim.uproject CreateProcess() returned 5