Hehe,let me tell you,
Human icon mean: Manpower,it like warcraft 3 gold,it use for build things.
Rocket Icon mean: Munitions,it use for upgrade somethings or cast spell it need use.
Fuel Box Icon Mean: Fuels,it like warcraft 3 lumber,it use for build things.
The blue arrow above the minimap that was give you see the Mission.
the blue circle under the minimap is warcraft 3 food,it has limit of training units.