The door in the last battle of "Against the Cockroaches", was moved by my casting of whirlwind. I'm not sure if this is a bug or if it's intended behavior.
Not a bug. It's actually a simple monster with no attacks. It's possible we should re-skin it to be a gargoyle or something.
I'm not exactly certain, I'm fairly certain that whirlwind was the very first card I played. So I'm going to say "Yes" it did have the trait.
If whirlwind was the first card you played then the door would not have had a chance to play its immovable trait, so that's working as per the card hunter rules. I did the same thing recently and it was very useful for completing that battle. I liked to think of it as my mage ripping the door clean off its hinges