Simple game not working properly

<spoiler> //fastpress

int gameState = 0;

int p1Button = 3;

int p2Button = 2;

int p1LED = 4;

int p2LED = 6;

int winLED = 5;

void setup() {

Serial.begin(115200);

pinMode(p1Button, INPUT);

pinMode(p2Button, INPUT);

pinMode(p1LED, OUTPUT);

pinMode(p2LED, OUTPUT);

pinMode(winLED, OUTPUT);

}

void loop() {

/* gamestate table:

* if gamestate = 0: game not running

* if gamestate = 1: game beggining

* if gamestate = 2: game on

* if gamestate = 3: light on; press button

* if gamestate = 4: player 2 wins

* if gamestate = 5: player 1 wins

*/

int pressed = digitalRead(p2Button);

int pressed2 = digitalRead(p1Button);

if(pressed2 == 1 && gameState == 0){

gameState = 1;

game();

}

if( pressed == 1 && gameState == 2){

gameState == 4;

}

if( pressed2 == 1 && gameState == 2){

gameState == 5;

}

if( pressed == 1 && gameState == 3){

gameState == 5;

}

if( pressed2 == 1 && gameState == 3){

gameState == 4;

}

if(gameState == 5){

for(int i = 0; i == 6; i++){

digitalWrite(winLED,LOW);

digitalWrite(p1LED, HIGH);

delay(100);

digitalWrite(p1LED, LOW);

}

}

if(gameState == 4){

for(int i = 0; i == 6; i++){

digitalWrite(winLED,LOW);

digitalWrite(p2LED, HIGH);

delay(100);

digitalWrite(p2LED, LOW);

}

}

}

void game(){

for(int z = 4; z == 6; z++){

digitalWrite(z, HIGH);

}

delay(50);

for(int z = 4; z == 6; z++){

digitalWrite(z, LOW);

}

gameState = 2;

delay(random(150, 400));

gameState = 3;

digitalWrite(winLED, HIGH);

}

</spoiler>

/r/arduino Thread