My experience was totally different of other player so i'll share it, in case it provides some interesting feedback. First of all, I never played Castlevania before, so I'm a "new" player. My issue was I got locked before the second door. I suppose it wasn't a bug that I couldn't reach the visible door, and that I had to reach the platform above. It took me a long moment to figure out that I have to jump on an enemy to reach it. I only had two health left, so in two tries I died. Is it normal to take damage when we jump on enemies ? In addition I felt like I was kind of a tank, very slow, so it wasn't even enjoyable to keep trying.
On a positive note, I think the mood of the game is really good, both in music, sounds and art. Good job