Not a bad first try!
Good Job Wario,
Being old, I really enjoy old 8-bit Castlevania games, so I may be biased on this one.
I really liked the choose your own adventure style choice near the end, and being able to start back from there was a wise programming decision. ( Simon would have whipped them though)
You should keep making Toons.
Tips for improvement.
Sprite base graphics being great and all. How about some nice art from Castlevania: Aria of Sorrow (one of the best ever!!) or Castlevania: Symphony of the Night (the other one!!)
Cut the scenes which are unnessicary, I thought I was watching someone play the NES there for a sec, which is kind of boring, unless its you playing the game.
The Music, even if you stick to the old school sprites, you shold really get some songs from the newer of the series.
Good Luck.