Should I upgrade or not?. but .
UPGRADE is one simple act , but it is difficult to implement because of our own imagination.

The main question is , what should be upgraded first?
When to upgrade ?
requires quite a lot of trial and error process .
But , one thing for sure and that is BALANCE !

In order to develop the city pretty well , we had to find the perfect balance between :
continue to do the upgrade , collect resources , and energy saving !
Obviously , this balance is for those who want to play this game without investing a dime .

To execute this balance , you must have an understanding of its own .
Here , I will list them in order from most important to the least :
1 . Upgrade ROAD / ROAD is the first key factor to upgrade the building unit .
2 . Upgrade HOUSE is the first key factor to upgrade production buildings .
3 . Upgrade PRODUCTION building is the first key factor to improve the road

Dont waste your energy on production of clay and iron because you dont need it yet, you will realize how important the energy is when you gain more level. Its hard to fill your energy, just imagine 1 energy per hour that means we need 4 days without activity to make it full.

Once you gain more level and experience you will understand how exactly the perfect plan for you. What should you build, what should you upgrade and when the perfect time. And you are finnaly understand how to conquer the two building at the very first time of tutorial. It seem confusing to manage that but soon you will understand how it works.

Important things to remember :
1 . You must have enough energy to UPGRADE , try to keep your energy above 60
2 . Each UPGRADE and then ENERGY PRODUCTION will be reduced 1 point
3 . Availability WORKER or workers , because every 1 worker would live only 6-15 days depending on the your remaining energy. Should remain available .

Just remmember to keep it on balance!