It would be an improvement if speech bubbles were refined more in both creating them and how they could function. They are an important part in making worlds, as they are one of the main ways dialogue is conveyed.
There should be a speech bubble creator UI, which would allow all of the Speech Codes (https://blocksworld-archive.fandom.com/wiki/Speech_Coding) to be used without having to type them manually out. And also, having multiple buttons would be very useful in games like RPGs.
There should be more customizability, such as having different styles of speech bubbles, like thinking and exclaiming. This could also help represent different characters in game.
There needs to be a way to make persistent dialogs, like the one that shows up when you lose a game. These could also double as menus in games.
Possibly text-to-speech could be added, though this could be it's own suggestion.
It would be an improvement if speech bubbles were refined more in both creating them and how they could function. They are an important part in making worlds, as they are one of the main ways dialogue is conveyed.