#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int buttonPin = 26;
int birdRow = 0;
int obstacleCol = 15;
int obstacleRow = 1;
bool isGamePlaying = false;
int score = 0;

void setup() {
  lcd.init();                      
  lcd.backlight();                 
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  if (isGamePlaying) {
    lcd.clear();
    lcd.noBlink();
    lcd.setCursor(0, birdRow);
    lcd.print(">");

    lcd.setCursor(obstacleCol, obstacleRow);
    lcd.print("#");

    if (obstacleCol == 0 && obstacleRow == birdRow) {
      isGamePlaying = false;
    }

    if (obstacleCol == 0) {
      obstacleCol = 15;
      obstacleRow = random(0, 2);
    } else {
      obstacleCol--;
    }
  
    birdRow = digitalRead(buttonPin) == LOW ? 0 : 1;
    score++;
  } else {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Play Again?");
    lcd.setCursor(0, 1);
    lcd.print("Score: ");
    lcd.print(score);

    if (digitalRead(buttonPin) == LOW) {
      isGamePlaying = true;
      birdRow = 0;
      obstacleCol = 15;
      score = 0;
      delay(200);
    }
  }
  
  delay(max(50, 200 - score / 5));
}