A complete ttrpg in a booklet is ambitious, and using the chinese civil war is such an uncommon narrative. Having the dungeon halls and spirit traits generated directly from memories is a brilliant design choice, and the 6-day countdown creates palpable tension.
That said, I have a couple of quick thoughts for future polish. Please consider releasing a text-based/accessible PDF. Reading a full game off image scans makes it difficult to search for specific terms mid-session. Also, being a whole new system, with some deep combat mechanic need in my opinion more references: how player turn actions, targeting limbs, energy expenditure ...
Also I didn't understand if there are mechanical penalty when a spirit's specific limb drops to 0 HP.
Truly impressive and evocative work for the jam! It just needs a couple more pages to give the system room to breathe and fully develop.