In this game you get added to 1 of 4 coloured teams your job is to eliminate as many enemy tanks as possible by the time limit in order to win the game. Around the map are health packs and ammo packs so if you take some damage after a fight you can prepare again for the next encounter.
You start off with 100 hp and 20 ammo, each shot does about 20 damage so its about 5 shots to take an enemy tank, bare in mind that shots travel in straight lines only so try to dodge oncoming shots if possible. The easier way to do this is either constantly staying on the move or hiding behind terrain. The easiest way to be successful as a Dat Tank is by working with your teammates, after all two tanks are better than one and they sure do a lot more damage!(Also if your teammates are scrubs, use them as meat shields)
To move your tank around use the right click, left click will shoot your cannon and health/ammo can be regenerated by driving over hp/ammo packs.