Pretty good OST, and pretty interesting game, which is made by a lot of music composers.
Music made by: Mace, Shower, Nana Yakayama and Ouka Shinomura, Yoiyami, Ryuuou, HAMRIKU, Minatsuki, Monday, Francium, KAI, Yoko Yasha, Io-kun, Wanwan, 古山智之(khirio), Prism, Misora, Koshian, ido,

BoSM Stage 6 Boss - Fuma Mishandra's Theme - Great Magic of the Power of Words ~ Starry Wisdom

Beware the Umbrella Left There Forever

Touhou 20: Fossilized Wonders —Watatsuki's Spell Card ~ Divine Sea Battle [Stage 5 boss theme]

Touhou 20: Fossilized Wonders —Hallucination Atop a Bivalve [Extra boss theme]

Touhou 20: Fossilized Wonders —Fantastic Drift [Extra stage theme]

Touhou 20: Fossilized Wonders —Player's Score

Favorite Show Ch. 1

Never Ever Stop Believing in U.mp3

Guitar instrumental that brings up the energy

DUDES

Kikyou's theme from Touhou Kisouken ~ Infinite Blade Pavillion.

Download the game here: https://www.freem.ne.jp/win/game/20533

Touhou Infinite Blade Pavilion OST 11 - Legend of Kikyouzuka ~ Black Ventus

Ghostly Field Club

GFC-Illusionary Night - Ghostly Eyes [Imperishable Night]

Touhou 20: Fossilized Wonders —Fantastic Drift [Extra stage theme]

Yukiechy