I think some things that could definitely make the game a bit better would be:
-save option (though I'm sure that's being worked on already)
-more story arcs and a way to show time is passing (characters like yet yet and Timmy getting older, yet yet becoming a more skilled adventurer, your beard growing etc.)
-hair and beard changing when you get a hair cut from the barber
-more achievements and rewards for doing certain things
-more dialogue from other characters (such as from those that offer gold in exchange for peoples or souls)
-different more tempting deals with the characters that offer gold in exchange for people or souls (witch, chest and devil guy)
-more dealing with the other kingdoms and creatures (mermaid people, tree stump people etc.)
That's all I can think of for now!