Hi! I've played the game and quite enjoy it. Add more enemy variation and boss and this will be a great game! I like that we use the half-ghost of Youmu in this game, as she rarely got some spotlight.
I found that the regeneration from level 12 onwards is quite ridiculous. I can leave the game on iddle and Youmu still can't die from enemy attacks.
Also, I managed to get out of the stage. XD
Good job with the game!