Give a certain amount of coins to players for destroying objects such as mines and infecting people (for example +5 points for destroying one mine +30 points for infecting someone) to then give out free decorations (like hats, moustaches, ties, fake noses, glasses, suits, etc.) at different prices (for example moustache 1000 points) for human and zombie team in order to incentivise players to attack when they are zombies.