I've put off getting verification until I finish the whole game, since it is a little pricey ( ´･_･`). But, there are ways to work around the block, depending on which version of macOS you're running! If you google the message, there should be pages talking about it.
try opening the app again, then go on the macos settings and then click "security and privacy" and click on the lock! Then you can allow the app and it should work just fine!
