Up VS Down

This is my first PvP mincraft game. The game includes 2 teams, the up team and the down team. The object of the game, as with most PvP games,  is to eliminate the other  team. The up team is givin TNT and Gravity Items with which to defend themselfvs, while the down team atemts to clime up with blocks and ladders to kill the up team. the game can be played with any amount of players and if it is recived well I will make a larger more complicaded map to play on.