Hi
This looks like a fairly straight forward utility. I am experienced at producing tools like this. I have written applications like this that help users with their workflows and these are currently running on 1000s of devices every day.
The utility will run silently at boot. After a defined pause, it will select the full-screen application before clicking on it. The utility will then silently close.
Due to security requirements implemented by Apple, there will be a few manual configuration steps that will be required on the Mac for such an application to run correctly.
Hope this helps