the game loop the game loop' code constantly updates the state of the game world by changing the position of the player and baddieshandling events generated by pygameand drawing the game world on the screen all of this happens several dozen times secondwhich makes it run in "real time while truethe game loop runs while the game part is playing score + increase score line is the start of the main game loop line increases the player' score on each iteration of the game loop the longer the player can go without losingthe higher their score the loop will only exit when the player either loses the game or quits the program event handling there are four different types of events the program will handlequitkeydownkeyupand mousemotion for event in pygame event get()if event type =quitterminate(line is the start of the event-handling code it calls pygame event get()which returns list of event objects each event object represents an event that has happened since the last call to pygame event get(the code will check the type attribute of the event object to see what type of event it isand handle the event accordingly if the type attribute of the event object is equal to quitthen the user has closed the program the quit constant variable was imported from the pygame locals module if event type =keydownif event key =ord(' ')reversecheat true if event key =ord(' ')slowcheat true if the event' type is keydownthe player has pressed down key the event object for keyboard events will also have key attribute that is set to the integer ordinal value of the key pressed the ord(function will return the ordinal value of the letter passed to it for exampleline checks if the event describes the "zkey being pressed down with event key =ord(' 'if this condition is trueset the reversecheat variable to true to