How can I improve my code for handling multiple button actions without adding bugs?

Have you looked into event-driven programming? Each button could emit an event that a handler listens for. This way, you only have to maintain the handler to add new buttons or actions, reducing the number of spots in your code you'd need to update.

You might want to explore using inheritance! Create a base class like ThingBase that has a method called DoThing. Then, each specific action (like ThingA, ThingB, etc.) can inherit from that base class and implement their version of DoThing. This way, when you want to trigger an action, you just call the appropriate method without checking types. If that doesn't fit your needs, switching to a switch-case statement might help streamline your code a bit.

You should definitely read up on polymorphism and function tables! These patterns can help you avoid repetitive code and allow for easier extensibility as your game evolves.

Consider exploring the DRY principle (Don't Repeat Yourself) which encourages finding ways to reduce duplicate code. Books like 'The Pragmatic Programmer' can offer insights into code generation techniques that might inspire better solutions.

Another common solution is to use a dictionary or a map to associate string labels with their respective functions. This way, you read the button's label and simply call the associated function. It's cleaner than a long if-else chain or switch statement and makes adding new buttons easier.