1. Click "Build Fence" to place fence posts
2. Buy animals from the shop
3. Animals interact when they collide:
- Cow vs Pig: Pig disappears
- Chicken vs Chicken: 4 new chickens
- Sheep vs Sheep: 2 new sheep
- Ox vs Ox: Creates a bigger ox
4. Press F to toggle fence mode
5. Use arrow keys to move camera
Press F to toggle fence building mode | Click on ground to place fence posts