On the surface, you play more plants vs. zombies, but deep down, it is a reflection of your mood. It gives me the feeling that you seem to be a very homesick person. You stay at home and play with plants and zombies every day, and then dream at night. Those zombies are just your own shadow, hiding at home every day, just like the walking dead, so what you see outside is all eerie tall buildings, and society is as terrible as the earthquake in front of you.
In life, we should get out of our own shadow, get in touch with the society and face all kinds of problems bravely. Try to grow up.