Soaring orchestral synth that makes dodging ten thousand bullets feel like a ballet. Mushihimesama is CAVE's insect-themed bullet hell from 2005, and the soundtrack by Manabu Namiki absolutely rips. "To Shinju Forest" opens Stage 1 with driving percussion and melodic lines that immediately get your blood pumping.
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"Levi-Sense" as the boss theme hits with this urgent intensity that matches watching your hitbox thread through impossible patterns. But "Requiem Of The Sky" for the true last boss is where it peaks, layered and desperate and enormous.
The inclusion of the location test version of Stage 1 is a nice touch for the obsessives. That specific mid-2000s CAVE sound, all synthetic orchestra pushed to its limits. Essential listening for anyone who has ever one-credit-cleared a shmup or died trying.