Ignore the haters. This is an excellent idea, I'm getting some old Borland vibes. Keep it up, can't wait to see where it goes!
>can't wait to see where it goes!
Fall into this toxic positivity nonsense at your own peril.
Let's imagine one do. What do you think can actually happen that is so negative? Toxic TUI will hunt you in dreams?
Gatekeeper blocks the app immediately. You'll see either "TUIStudio cannot be opened because it is from an unidentified developer" or "TUIStudio is damaged and can't be opened" on newer macOS after quarantine flags the binary.
To get past it: right-click the .app → Open → Open anyway — or go to System Settings → Privacy & Security → "Open Anyway".
Neat concept though if it ends up working.
You seem to be implicitly trusting the creator of the app, which is a mistake.
That being said, I'm quite confident it would be possible to both get that assurance and have the software behave in ways that are unexpected or undesirable.
Furthermore, it does appear to be open source, so you could always download a copy from github and go over the code line-by-line if you desire.
My point was that, at the point where these devs seem to be at, it's quite innocuous that they haven't paid the apple tax yet.