If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Another day in the big city from a taxi driver's point of view. Look out for passengers and deliver them to their destinations as fast as you can, and without damaging your taxicab too much.
Arrow Keys - Drive.
R - Change Radio Station.
H - Horn.
Spacebar - Refill your taxi with fuel at a gas station.