I wanted to continue further, but the game softlocked at Youmu rip. The idea of having a battle system based around restorable SP is interesting, and the writing was really well done. The first boss is a bit mindless though since the tutorial doesn't come until after.
4 years ago (+1)
Hi there! We're so sorry for the bug, the team will work hard to fix it as soon as we can! 
For now, in order to progress your game, please try to avoid touching the right side of the staircase (and use the left path instead) as indicated by this badly drawn diagram :) Thank you!