For me it was quite pointless. I just need to kill slimes? If you create games you should or give a player high purpose, or make process itself satissfying, and for it wasnt. Try for example give a little more dynamic to game, make an andanced AI for enemies and more complicated weapon, such as ranged weapon or something. Also you could use age for gameplay, for example with age player becomes slower and weaker, but has more weapons.