OSX 10.15 no longer has the "anywhere" option, apps need to be signed now by a developer certificate :/ a quick fix is to run the following command in terminal: xattr -r -d com.apple.quarantine <path to file or app>
Dammit Apple :( thanks for the fix. I'm publishing all my games on web from now on, maintaining different OS versions takes so much time and effort, and I can't do that with my resources.