I think a better question is "Why would you want to publish this program?" I hate to be the one to crush your dreams, but nobody is going to use this. There are already a gazillion text-to-speech programs out there with more functionality (and less "thanks for using my program hehehe" popups), so why bother? One of the first things I made in Construct was a text-to-speech program, but I didn't even bother posting it to the forum because, as you said, "it's super simple." Just keep it to yourself and consider it practice in learning Construct.