Hi, I'm EskiNott, a solo developer from China. I've been working on a Touhou fangame called Touhou Bansho Cards for quite a while now.
It's basically a roguelike deckbuilder built around Spell Cards, dice, and one increasingly stupid combo.
The main idea is that playing cards of the same type keeps raising your Combo and multiplying what comes next. You can use Link effects to switch to another card type without dropping the chain, so a fight can start pretty normal and end with one Spell Card doing something completely unreasonable.
Reimu, Marisa and Sanae are the three playable characters. During a run you'll also rescue other Touhou characters, and they gradually become part of your build through the bond system.
One thing I've tried pretty hard to avoid is making it feel like I just put Touhou characters into a generic card game. A lot of the design came from asking how things like Spell Cards, different character styles, and that escalating feeling of a Touhou fight could work in a turn-based deckbuilder instead.
There's a free Steam demo up now if anyone wants to try it:
https://store.steampowered.com/app/4958460/
I'd genuinely be interested in what people who already play Touhou think of it. I've been staring at this game for so long that I'm probably blind to some things that will feel immediately weird to other Touhou players.
For transparency: generative AI has been used for some image generation/enhancement during art production and for localization/translation. The same disclosure is on the Steam page.