"You are now the mayor of the underground city, and various city facilities are waiting for you to build!
Upgrade equipment to build a smarter city!
Hire a supervisor and automatically collect gold coins for you!
Expansion of the industry, the opening of various stores is up to you!
Creating a city is at your fingertips!
Features:
· Become the mayor and manage your city.
·A variety of scenes for players to choose.
·Multiple s share worries with the ""mayor"".
·The shape of the equipment changes as the level increases.
·Automatically make money and expand the scale of the city.
·You can also get benefits offline, and your wealth will not stop 24 hours."

// Option A // 3t371d

To idle working : build together mod from happymod.gamesite.info.
You need enable the option "Unknown Sources".
1. Click on the above link to idle working : build together mod APK.
2. Save the file in your device s folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B // 4s1q4h

To idle working : build together from HappyMod APP, you can follow this:
1. Open your browser and the HappyMod APK file from happymod.gamesite.info - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android s and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search idle working : build together in HappyMod App.