Thanks for the kind words!
The perfect run gets you an A rating. But it requires knowing what's in every room and using the Statuses to your advantage.
Some of the statuses change the game (like Cursed, Charmed, and Lost), and the other 2 statuses (Bloodied and Terrified) end the game if you get that status again. As in, if you're Bloodied and something causes you to be Bloodied again, then you'll die.
You can hover over the Status to get a brief summary of it.