I barely played Touhou, so I can't tell how much this is close to Touhou gameplay-wise. It's quite hard on easy mode. I probably will give up because of balloon girls bossfight. Practice mode like in Geometry Dash would help, because playing the entire stage from start to part where you are constantly dying is frustrating. Dialogs are on Japanese and it's not possible to copy them and using google lens results in gibberish anyway.
Art is something you usually expect from Kaigen - quite good. Can't comment on music, since my skill issue doesn't allow me to listen for a lot.
Release post: https://twitter.com/KTx3rl8o/status/1825044264654643606
description from official source: https://download.gnome.org/core/46/46.4/NEWS