So this game is a "remake" (really feels like an enhanced port) of Castlevania for the Sharp X68000. Because the gameplay is so similar, I'll recap some of what I said there
it's a good remake that I like more than its SNES sibling, with the multidirectional whip being not as busted and a fair compromise (you gotta jump first and you can't whip upwards) and the new areas being really creative and Werewolf being one of my favorite fights in the series.

What's different here in the Arrange Mode are a few minor things, like new sprites for Simon and Dracula, but also the addition of Difficulty options to make this game more fair. The original Difficulty is still there on Hard Mode, but the new Normal Mode goes from the original's 5/4 hits before you die to 8/5 or 6 hits, and in addition on all difficulties Simon no longer bounces back upon taking a hit which cuts down on cheap deaths and most notably makes Level 2's water raft segment a lot easier. While I think it makes damage tanking too viable in certain spots, that's only because I beat the original game first, and really this mode is much fairer.

Also new is the music, arrangements, which are really good. Not much else to say there. But what is else to say is the last big new thing, which is a Time Attack Mode. Castlevania is usually a game thats difficulty more so rewards slow and meticulous play, but a mode that encourages you to go as quick as you can really changes your approach which definitely made it really welcoming!

This game is a remake of a remake, one of the earliest games to be so I believe, and is most likely to be the version of Castlevania 1 I'd recommend!