advantages:

graphics 4/5
good anime touhou graphics

music: (for most people) 4/5 ; (personally) 2/5 as a touhou rearrange
many people thought its music is great, i don't think so. this game's musics are all rearrange/remix of official touhou stg musics. but the musics of this game even feel worse than its original version. it's more a ruin of original music. if you aren't a very touhou enthusiastic, then it's good enough.

warnings:
NSFW warning:
if you play this game at work, your boss must be surprised(at multiple meaning) when you defeat enemy. not to the extent of watching ♥♥♥♥♥♥♥ though.

disadvantages:

pricing 2/5
will be 4/5 if i didn't spot its upcoming paid dlc.

singleplayer experience 4/10
somehow below-average bullet hell game experience.

game design 2/10
bad plot. short gametime. a expert bullet hell player can completely finish this game within 5 hour.
retarded controller layout. go play yourself with a controller then compare with other bullet hell, and you find out why. keyboard layout won't be so retarded, but still to a extent.
bad skill handling. i can even say it's anti-human. combined with the control layout problem, i spent time on getting a good layout. for me, i used a layout similar to touhou hisoutensoku.
game plot is far from intriguing.
i feel even the prologue is better than release version.

TL:DR don't buy this game.
.
if you want to skip my personal biases, then go to next comment. don't read the rest.
i may need to apologize to this part (?
cuz this game is far from what CAN be related to touhou and in the same time attracting tons of those SHOULD NOT APPEAR, can't tell much cuz even myself don't have a clear idea about this, just for example: A former genshin impact player get in touch of this game and sending embarrassing things like "ahhh i am a sex slave of yuuka." "i want to become a woman and be raped by futa tewi" in somewhere like an all-age discord channel. this phenomena is especially prevalent among chinese on chinese communication platforms.
i just become intuitively hostile to this game, and even touhou mystia's izakaya too, at first glance. can't tell why, so i just find a day that i become more calm to write this review. just find this game a poison for touhou purely on intuition.

nevertheless, i will still give this game a negative review without bias. this game is way-too out-of-character from original touhou. and, i can even say that the selling points of this game is its erotic content cuz i have frequently heard people said so. i'd love to give a sexual content tag rather than a bullet hell tag.

Goated game
Fights are fun and OST is an absolute banger
Its essentially a boss rush so beware
I highly recommend if you are looking for a fun challenge, there is a baby mode but you wouldn't use such a thing, right?

hard but good

nice ass lmao

Why you put clownpiece in stage one.... .

Very fun game. Just challenging enough, and if you are really struggling to beat any bosses, there's assist mode. Bullet patterns aren't too overwhelming, and it isn't too impossible to no hit any of the bosses. It took me a while to do all the no hits, but it is definitely possible if you just keep going. There is many different play styles with all the different attack items, and many different spell cards. I also found it pretty fun to experiment with all the different equipment and badges to help no hit the different bosses.

Also, as with most Touhou games, amazing soundtrack. A great mix of Lofi and Battle music.

i hate Aya Shameimaru and i hate ZUN for creating her

good

Peak

I really want watermelon now.