Basically you can chose between 5 different tanks and colors.
There is only 2 factions, The players faction and the npc in game. Max level is 5 and you can upgrade your tank buy killing the npc or players to get the money and killing points. You need 50 kills per skill level up the max is 200 kills.
I'm sure i missed a lot of thing will add as I remember.
Hope someone will enjoy this game.