Currently, I feel like the character is too little for the tile set itself. So I've decided that I'm going to change the ratio from 16x16 to 24x24. This is a huge improvement in the ratio of the tile set. Aside from the ratio, I've decided to ditch out the "bushy" outer wall and replace it with more organized one. This can improve the aesthetic of your game.

Let me know your ideas so that I can create and add them to this tile set. :)