Love the art style and the twist on the "This guard always lies" trope. One thing I'd change is I'd show the original rule or the other dialogue onscreen after you click away. it was sometimes hard to remember. But I guess that's the game!
Thank you for playing my game! It is actually in the game! You can click on the bubbles above the doors to see the dialogues again! But the rule are only shows once though. And that was my mistake for not telling players about the bubbles!