Cant play the game

This game doesnt come with everything you need to play so upon opening the box and setting it up you realize it only comes with one dragon ball and 2 cards. You cant play without buying all the extra game pieces which is very saddening. It should be a game that includes enough to play then you can buy extras if you want to. The Coliseum is easy to set up and just clicks together and it's very large but my boys were very disappointed after getting it all set up only to find out they couldnt play this game. Total let down.