Thank you for your feedback!
I’m happy that you enjoyed the game :)
You are right. We must show the character’s movement speed elsewhere except in the bottom panel. There’s currently a hint about the characters’ todos when you mouse over their tag. The movement speed needs to be there and maybe in the briefing panel as well: 
We wanted to add the “Undo” button but haven’t had time for it yet.
The fairies are planned for the Spring set of levels :) Optimistic ETA is Spring 2025
How can witches visit the Bean Bevers? Interesting question. Let’s say they use magic to make themselves smaller :)
Gertruda’s sprite was kind of a draft when we decided to include it. And it looked pretty OK, so we forgot to add more love here. We will try to improve her :) Thank you!