Likely taking inspiration from Koji Igarashi's formula of remaking Symphony of the Night ad nauseam (har har har), homebrew coder Frosty Chaotix is working on his own vampire-slaying update for the first Castlevania NES game. He released a demo for Castlevania: Devilish Resemblance yesterday to show off his progress on the project's engine, and it looks fantastic! Of course, most of that can be attributed to the ripped 2D assets from previous titles in the series, but it's still an impressive project.
So far, this proof-of-concept build has Simon Belmont walking, jumping, and whipping to his heart's content, all within the confines of a single test room. While there's still a lot left to be implemented -- e.g. enemies, interactive objects, touchscreen controls, etc. -- the soundtrack, grabbed from OCRemix, is the cat's galoshes. We totally wouldn't mind vanquishing the Prince of Darkness to this music!
See also: Leaked Castlevania screens or whipped-up fakes?
Gallery: Castlevania: Devilish Resemblance