Japanese pixel art sidescroller, featuring a vampire gaining back abilities

Platform(s): PCGenre: Sidescroller/PlatformerEstimated year of release: Maybe 90s-00s?Graphics/art style: Pixel art, colour scheme mostly purpleNotable characters: You play as a cute vampire!Notable gameplay mechanics: Collect and build on existing powers/abilities as you play through the game. Similar playstyle to Cave Story.Other details: Originally Japanese, but had an English translation patch available!​I know this is really vague! Just thought I'd see if anyone knows what I'm talking about. My searches yield weird vampire-related hentai. via /r/tipofmyjoystick http://bit.ly/2SfUYPP