Making buttons not clickable once they have been clicked

I would avoid using the built-in states in this scenario as they will eventually interfere with each other, and go with what Judy suggested in her post. I happen to have a similar example that I created for someone a while ago, but adjusted it a bit to show 'disabled' buttons. In this example, I didn't have time to replicate all four buttons to match your settings, but I believe the concept remains the same. I only utilized custom states and transparent shapes to act as button 'disablers'. Attached is a short video demonstrating this interaction. Please let me know if this aligns with what you are looking for.