From a more "technical" standpoint, the tooltip system is kinda wonky on the web exports for the version of Godot we're using. Will be fixed in 4.3! Just like an additional like 6 big things we had to find work-around for...
We definitely have been wanting to make an interactive tutorial, or at the very least a video tutorial. Give the game a look-up in a month or two to see what we come up with!
As for the final boss, and all the enemies for that matter, the balancing was very... Shall we say, instinctively done. And by that I mean thrown together willy-nilly. The boss "cleanses" a few status effects each round which is supposed to balance out the freeze/stun solution, and burn almost directly counters it! Balancing could definitely use some work.
I'm glad you enjoyed it! Do tell people, we're always looking for feedback. On that note, good feedback. Very helpful.