Aye yeah, this is pretty damn cool
Alright, beat it! Got an A Rank, I dunno if that's the best one or not, pretty respectable for a first playthrough tho. The ending I got is the one where she wakes up in a morgue, so... by crossreferencing with other comments, the rank is independent from the ending you get, and what I got was the middle ending in terms of speed (I've seen the fastest ending in a playthrough, I'm assuming she'd wake up in a buried coffin in the slowest ending, which... yikes)
Btw, the code I got was a great reward! Trying to avoid spoilers here: I see some of them apparently weren't used in the final game, and the last one is a pretty neat detail.