I like that it's faithful to the original and faithful to the NES's limitations at the same time, but with that said, there are a few gameplay issues that annoyed me a bit.
I'm not gonna mention the bugs, since this seems to be one of those projects that's made in a very short time frame. I will, however, mention that, due to the size of the screen with relation to the characters, the time frame between an enemy appearing on screen and hitting you is so short it is kind of hard to react to them at first. This is particularly annoying with fast moving enemies, and in the beginning of the game.
When I got the hang of it, stopped trying to go fast and started treading more carefully, the game ended up being really fun, on top of looking and sounding super cool. Too bad there was so little of it.
The dark room in particular is really interesting. Due to the diminished field of view, we are forced to orient ourselves by sound to know when enemies are approaching. I wish more games would do that, turning our way to interact with the game upside down while still retaining the same mechanics.
I have, unfortunately, never played the original Bloodborne due to not owning a PS4, but I have watched a handful of Let's Plays, and it is definitely awesome. This tribute is also quite awesome, so yeah.