Idk if this would be the right place to post but when searching mystera in Google play the second result is a game called Laurum Online, also I don’t know if mystera has 100% original graphics but this game has the same sprites.
Sprites are public half of the good survival games out there use them and add their own with touches. E.g. the pixel survival series. I’ve played that so long it feels weird drinking potions there and using it as dye here. Then when I play it after Mystera I feel weird drinking dye lol