Coding Challenge: Recreate Zuma game

[Zuma Gameplay](https://youtu.be/6UIXVxSsDUk?t=2m37s)

> Zuma is a tile-matching puzzle video game. The objective of Zuma is to eliminate all of the balls rolling around the screen along a given path (the path is clearly visible in all of the levels except for the last level) with other balls before these balls reach the yellow skull structure, which will open to varying degrees as a warning of oncoming balls. The player can carry two balls at a time and can switch at any time.

This could be recreated with with Dan in middle and train wagons of different colors coming towards him.