After digging deeper it does indeed look like it is a false alarm.
BTW, this is a nice little game and I quite enjoy it. For some reason it reminds me a bit of Downwell and that is not a bad thing to be compared to. :)
You have to sign the game so Windows & Mac dont send user warning. I looked into it for my game and it seems like a pain. If you end up finding an easy way to sign the game let me know. "Digital certificates are used to establish the identity of the author." This might be how you do it, https://learn.microsoft.com/en-us/windows/win32/dxtecharts/authenticode-signing-...