I really enjoyed how many ending variations there were! Looks like there are 3 main endings, but multiple variations on dialogue depending on how you attacked and what you said. That's so cool! I feel one of the endings could have been developed more, because it does loop continuously in dialogue if you choose to not see it through. It eventually leads to one of the other endings.
Did I gamer rage a little when my mace clearly went through the player but idk. Invincibility frames? Makes me feel like an actual boss lol.
After 9 endings/variations it does make me feel a little hopeless haha. In at least the endings I reached, the Queen really doesn't feel like a player but an "it," so I enjoy how frustrated I feel.
You can finish one ending in ~20 minutes, but some endings can be reached much faster. 100% give it a try but don't quit after one ending imo.