2021/2022 Update!
In sandbox mode new resource is available - bombers. This additional asset makes serious difference:
-keeps the distance to the target so it is not reachable by anti-missile systems,
-gets back to homeland which makes it ready to reuse,
-uses decoy traps to divert intercept missiles,
-take off from urban areas!
Moreover, in sandbox mode player will see current limit of rockets, launchers and bombers. Those numbers depends on mobilisation widgets wisible at the top of HUD.