I'm not going to lie, there are some flaws. The English translation is a bit... weird at times (grammar-wise and word use). And overall I think it's a good thing to let the player know when using a key so if people forget which doors were locked they aren't confused. Besides that, it's a really neat short game, and I enjoyed it! The art was really nice as well! I'd definitely love to see more games from you, as I see definitely some potential! Just those 2 things I mentioned are things you could work on.
When it comes to the story, it's maybe not worked out in the fullest and it has much more potential to it. Why did he become a vampire? Or did it just happen? How did he become a vampire? He seems to know how to become one as in one of the endings is kind of proven? If you can work this out, with better translation (I'd offer my help in improving the translated game so sentences get a bit better) and with knowing when a key is used then I'm super excited to see your future work!
Thanks for this fun short game! If you want me to tell you the grammar/word use mistakes I wouldn't mind doing that. You got a new follower regardless!
-- Silly me, I accidentally posted this as a reply to a comment first time, where was my head lmao --