HappinessHappiness is a priority for getting the most of out of your city as it affects how much coins and supplies you receive when collecting. It also affects how many points you receive after battles. The angry face means you have not reached the required happiness and your productions will only work at 50% efficiency meaning a loss of coins and supplies. The Happy face means you have hit the demand for happiness and your productions will work at 100%. The Enthusiastic face means you have reached a happiness value of more the demand for happiness plus 40%. This gives you a bonus of 20% over the normal amount paid out by buildings that produce coins and supplies. Happiness Calculations To work out how much happiness we need to produce enthusiastic we use the simple calculation of the demand for happiness multiplied by 1.4. As can be seen here the Demand for Happiness is 242, so if we multiply that by 1.4 we get 339 and that is the target to reach with happiness. When placing new housing though we can use a slightly different formula. If we divide our provided happiness by 1.4 we get how much population we can have before we lose enthusiastic. So in this example 360 divided by 1.4 is 257. We then subtract the demand for happiness so 257-242=15. This means we could add 15 more population before we lose enthusiastic. If you intend to add several houses then divide this number by the population of the house type you want to add and round the answer down.