The game itself cannot be any more simple, being a risk/reward title that will require you to leave the pizzas in the oven for just the right amount of time, so that it ends up with the perfect crispy crust. If you were to remove them too early, or take them out slightly more burnt than normal at the sides, do expect the customers to be unhappy. Waiting customers too, will help contribute to the overall rising tension, which would then force you to make mistakes.
How was this pizza simulator done? Apparently, the creator attached a GoPro Hero3+ to the tool that was used to take pizza out of the oven. Definitely a game that will make you feel hungry at the end of a few rounds, never mind that you just had pizza for dinner.