I already am changing :3

Made a room for a cow in my house (trapped the cow, made a tunnel to the room in the house, freed the cow to be able to move in the tunnel, when it got to the room, I closed it). Unlimited milk

Plus, the 3rd tower is still not finished.

I made a cactus and sugar cane farm outside.

Finally, I'm thinking of making the underwater house link to a deeper underwater house. That's gonna take some time seeing that not much more sand is near me anymore :3