I assume Mofu-san will be working on the balance of the game frequently until it's in a near complete state, as well as post launch in the future. At the moment, the game still doesn't have proper level designs or minor enemies to fight.
Right now, the levels are more just test spaces/rooms to test the bosses and make sure certain types of platforms or other things works.
Later when the maps are redesigned and expanded, Nene's will have more truffles to collect, which increases her health. If the game isn't properly balanced to factor in the changes in level designs and collectables, it could potentially throw the balance off completely.