Mac users: Before downloading this, be aware that it will NOT run on OSX Catalina without a modification to it. You will only be able to run it after doing a code update in Terminal yourself. Here's what you need to do:
1: Download the app and put it in your Applications folder
2: Right click on it and choose "Show Package Contents"
3: Open the "Contents" folder
4: Open the "MacOS" folder
5: When you see the "Siren Head v1.0" app, you'll need to open the Terminal from within that folder
(You can Google how to do this if you don't know - it's easy)
6: Once you've got Terminal open, cut and paste this into the terminal and hit Return: (no quotes)
"chmod +x Siren\ Head\ v1.0"
7: Close Terminal and then go back to the App and double-click. It should now run.
You have to do this because of the new security settings that Apple put into the Catalina OS. Hopefully the developers will patch this soon but if you do the above, it WILL work.
Hope this helps
(thanks to rafaelgdp for the tip)