Getsu Fuuma inspirational ideas or homages?

I suppose you could get some inspiration from this.  It came out 1 year after the original Castlevania.  It got a couple of homages in other games like Contra: Hard Corps and pop'n music.  It was a pretty standard action platformer that didn't really take off.

Maybe Zangetsu could get a line of dialogue or two that makes a reference to Getsu Fuuma Den.  Or maybe he could have an ancestor named Fuuma.

Think of this post as a rough guide to Dragon_of_Dojima 's linked video, where I highlight some interesting things from the game, that being useful ideas that could be used in Bloodstained or simply WTF things. Please as a starter to discuss ideas, I really want to hear people thoughts about this topic and can even start a poll if needed later.

Since I've watched the entire video in one go, when instead I should be sleeping don't expect a masterpiece written below:

I like the fact that Getsu use kanji to attack enemies apart from his sword, as if it some sort of talisman and get souls instead of hearts, two things mentioned in Zangetsu backstory (He can see auras even from the dead and use talismans/ofuda). I can be only thinking about it too much.

At 22:50 these are stained glass windows? At 28:09 it features colors that surely will be familiar. Also I like the concept from enemies appearing from the ground without a hint and then hiding again.

At 31:05 it strangely becomes like Contra's Base stages and after battling a cool yokai goes to... heaven? After traversing more at this endless maze he reaches a fiery place and fight the first boss at 42:05

At 54:55 we can see some pillar with really creepy eyes, I would like to see more details like this in Bloodstained. At 58:21 he finds the second boss that wants to battle even after you do his deal, he is cheap.

Well, at 1:10:52 we discover that this maze from before were strange and difficult to traverse, because he lacked something to light the tunnel as we see here in this part. Watching really made me want a maze area in Bloodstained but not like that, instead they could use something like they did in Aria of Sorrow. It would be smart to Gebel use a mirror maze to confuse people as a last line of defense and could feature manequins that resemble Miriam using dancer outfits. They could be tortured souls from female alchemists trapped inside it.

1:19:30 shows the third boss. Now finally I see a interesting boss in this game.

1:30:55 a fake sun/moon? That is brilliant! !:32:10 we can see a well from where enemies spawn, that is good too.

!:40:25 WTF is this small enemy? Also we need more non-enemy obstacles like in this stage, we don't need to rely only on spikes.

1:44:43 this creature is interesting too.

1:47:03 here we discover that Getsu will need to reach a castle that is past the sky.

1:52:41 if I understood correctly, he is fighting here against reanimated corpses from his 3 antecessors to retrieve the 3rd and last "hadouken" (lol) and thus enhancing his sword power to its true potential.

2:08:05 what?! I don't even...

2:09:10 final boss