The goal of the game is to create a bull with only green traits
This is achieved by cross-breeding your bull with those of the other players
To cross-breed your bull with another player, both enter each other's 3 digit #code (see top left, on the orange bar)
Cross-breeding follows 5 rules:
Simular traits won't change
Left column trait + Right column trait results in center column trait.
Center column trait + any other trait results in the other trait.
Green traits only have a 30% chance to change.
Each cross-breeding has a small chance to cause a single trait to mutate.
