Turning the original Castlevania into a metroidvania style game is a fantastic idea and I'm having a lot of fun with it so far! I'm a little confused about how to get some of the health upgrades, but I'll figure those out as I go. My only real complaint is with the moving platforms. Some of them move so fast you can barely see them. I'm not sure if they're supposed to work that way or if my it's just my PC, but it made certain sections pretty ridiculous. I also think that some of the higher definition backgrounds really clash with the NES aesthetics, but that's more of a nitpick.