You want a Classicvania experience, then I've got your shooter right here (apologies in advance for gushing):
Koumajou Densestsu AKA Touhouvania by FrontierAja
Two games, 6 stages with a post-game extra one each. Ridiculous/dumb story in the first one, but the second game has some real professional Japanese VAs they somehow roped into it.
The character art is amazing and you can very much tell how much of a tribute it is to Ayami Kojima's style. In fact the artist later got hired by Konami to do cover art for some albums!
The stages are all also very nostalgic in their art direction, design, and setpieces, although more so in the second game. Bosses fuse the bullet hell trapping of Touhou with Castlevania's dodging mechanics to make a pretty fun combination.
The first game is a bit weak. Other than the lack of voiced dialogue, the story is just dumb all the way throughout. The stages are for the most part kinda linear; there's not much verticality at play, and lots of cramped corridors with too big enemies.
You have your whip, slide, 2 weird subweapons (that never change or are added onto), but no jump kick. You can also fly indefinitely, which makes you shoot very weak projectiles if you want to attack. You'd think this would break the game, and it kinda does at points, because the developers placed indestructible enemies that chase you nonstop if you try to fly over a stage.
Now the second game is a huge improvement in every way. The levels are far more diverse and recall various environments from across different games, verticality and level gimmicks come into play in very good ways. Your infinite flight has been removed; instead there is now a stamina bar with multiple uses that refills over time. You can very slowly fly around a bit with it; alternatively, you can deplete it to use a Crissaegrim style attack. You also get back the jump kick, in addition to a backflip and a weak ranged attack that can be used by backflipping and attacking at the same time.
Before every stage, you get to pick 3 from a variety of subweapons, and you gain more as you progress in the story. You start with Knives and a Pocketwatch and later gain "Partners" that essentially substitute for the Axe, Holy Water, etc...
Enemy variety is much improved. While the previous games mostly had fairies and skeletons, with some minotaurs and werewolves for good measure, this game has both those and a bunch of additions, from golems to angels, the good old knight armors, alraunes, and more.
Character art is as great as always, and the story tries to be serious throughout with one or two humorous moments.
Worth noting, the developers are Japanese, and actually added both English and French support to the games themselves! Which didn't really work in the first game's favor, as they clearly did not have a proofreader or native knowledge of English. Luckily, this is resolved with the second game, which has a much better localized script.
The music in both games is amazing and is very much a big fat tribute to Castlevania tracks. For example,
Scarlet Tears here is certainly not based on any track playing in a clocktower (seriously give this one a listen)! And this
stage 1 theme certainly doesn't hide its inspiration from Simon's theme.
Don't take these for ripoffs or something, they're still very much their own original compositions, it's just that you can hear the references within the music.
And of course, the most important element... Wallme- Er, WallSandwiches and WallCakes are plentiful in both games.
You can digitally buy both games for about 20$ on FrontierAja's website, where they also host some patches you have to get if you want the game in English.
Credit goes to ProfessorProf for these images:
Second Game
Subweapon Screen
Later Subweapons in Action
Your run of the mill boss fight
EDIT: Say, can I spin this post off into its own LTTP? I ended up going a bit too long here, heh.