I like the idea of gathering the elemental materials from around your house, and the whole thing is very on-theme for this jam. Using the elemental symbols as hints was a nice touch.
I almost got stuck just trying to leave the room, but eventually realized that I needed to wait for the next line of dialogue to start in the book, rather than clicking through, which would restart the dialogue. After I found all four elements I got stuck with no dialogue starting anywhere, except for the bucket which was happy to repeat itself.
I also used Dialogic for my game. I'd never made something with dialogue mechanics and I way underestimated how difficult it is to get all the logic figured out so that it works no matter what order people interact with how many times, and that's in addition to figuring out what's a bug that's completely my fault, and what's a bug that has to do with a quirk of Dialogic. But it's pretty powerful, and once I figured out how to send signals from it, call functions, set variables, etc, I'm glad I decided to use it.
One thing I wish I figured out earlier was to gate all dialogue calls with:
if Dialogic.current_timeline == null:
to only call the dialogue if there's not one already running.
I also had the issue that I really wanted to use the same button to start the dialogue as to continue and confirm dialogues within the system, and at first I was getting stuck with dialogic simultaneously restarting a dialogue when I was pressing the button to close it, which I solved by getting the dialogue end signal and creating a timer where a dialogue couldn't be started for .1 seconds after a dialogue had ended. That seems like something that the plugin should handle automatically, but, it's still in alpha after all.