Nice work. The graphics really are particularly good, and the music is fitting as well.
But just a suggestion... the jumping motion on Castlevania is very strange, he goes straight up diagonally and then comes straight down diagonally again. I see this a lot in the AMOS games. Really he should move in move of a parabola trajectory because of gravity. It's easy enough to do, simply give him an upwards velocity when he jumps and accelerate him downwards at a constant rate. In fact I find a little bit of acceleration/inertia in all directions makes controlling a character just that little bit more fun, and it feels more professional.