Love me some card games. This game brought out an great mood which tied very well to the theme, the dark atmosphere and the unnerving audio definitely brought chills down my spine. Also how the surprise factor that was brought throughout the mysterious setting and narrative made it special as a whole.
I like what you did with the knife and how cool it affected gameplay (Although making it somewhat difficult).
For bugs, other than the warren cancel to draw infinite bunnies. There is another that if you rush through the tutorial by playing cards too early the game gets stuck, and you cant ring the bell to progress either.