Here is the full list of all 21 Yumori Forest achievements.
defeat 10 enemies
defeat 100 enemies
defeat 1000 enemies
defeat 5000 enemies
collect a total of 100 buries
collect a total of 1000 buries
collect a total of 10000 buries
deafeat tetsu
defeat domokai
defeat ciar
survive with less than 20 hp
complete a round without getting hit
defeat 3 enemies with 1 attack
kill an enemy with a deflected arrow
buy all potion upgrades
buy everything in the shop
reunite with the forest cat
finish normal mode
bow to the merchant
finish hard mode
finish normal mode without leveling up