Ton Up Cricket Zombies Edition

The whole ground has turned and all you've got is a bat. Top-down 16-bit arcade survival cricket: a normal game, until the crowd, fielders and umpires shuffle in as a hungry horde. You can't run and there's no total to chase, just: how many can you put down before they eat your last batter? Middle a four and the four nearest burst, a six clears six, and a timed direct hit chain-detonates the horde. The waves keep coming and they get faster. Go for the ton.