Can you Move Buildings?
Most structures can be moved to a different location by tapping and holding. The exception to this are resource buildings that need to be placed nedt to what they are harvesting.
What is the Best Positioning for my Troops?
This will depend on the enemy you are facing and your current level of APC research and Hero recruitment. Generally speaking shooters are better against certain enemy types (vehicles) and fighters are better against others (zombies). The front line should be for units with high defensive stats, the middle position is for units with high supportive stats and the backline is for units with high offensive stats.
How can you Change Class?
You can either follow a 'class change' prompt or change class anytime by tapping on the main Base building and choosing the 'Class' option which will take you to the 'Change Class' screen.
What are Hero Tokens?
Hero tokens can be exchanged for valuable items. 20 hero tokens are included as a reward in the Daily Challenge chest (Level 3) when you max out the task. There is also the option to buy hero tokens with real money as part of one of the in-game purchases.
What is the Daily Supply?
Each day you can enter the Benefits Center and claim your daily supply which will feature 3 items such as resource boxes, recruitments tickets and hero EXP.
What is APC Durability?
Each APC (Armoured Personnel Carrier) has an amount of durability that is shown in the APC screen next to a green hammer and spanner icon. The maximum that an APC can have at any time is 100. The durability recharges over time, but if you are attacking enemies then you will use it up faster than it regenerates.