The aesthetic is wild I would be fascinated to learn what your process is for the art, since I'm guessing this isn't drawn in Decker, lol! The characters are so mean though, haha!
I did have some trouble with inadvertent double-clicking, I think because some of the clicking on people was triggered by a mouse-down event, whereas advancing text and such was triggered by a mouse-up event. So I'd click someone, immediately they'd go into a dialogue sequence, but if I released the button too slowly it would register as a click in dialogizer and I'd miss the first line of dialogue.
I think this is because the "click" event for a canvas runs on mouse-down, whereas for buttons and such it happens on a mouse-up. One way around this (which is how I've done it in my own stuff) would be instead of having the clicks handled by the canvas itself, to have a button of the same size as the canvas that handles the input. Then you also get the benefit of the mouse cursor changing to show that it's clickable - which may or may not be a desired feature, haha. There is also a "release" event on a canvas that might work too?
But yeah this is so wild and there's a cool range of puzzles going on here. Nice work!