A setup for the Alphabet Game - three buttons are required, and players attempt to be the first to find the next letter.

AlphabetGame.ino

#include <LiquidCrystal.h>

LiquidCrystal lcd(8, 9, 4, 5, 6, 7);           // select the pins used on the LCD panel

int bluePin = 11;
int greenPin = 12;
int redPin = 13;

void setup()
{
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Alphabet Game");
  lcd.setCursor(0, 1);
  lcd.print("ledlogic");

  pinMode(bluePin, INPUT_PULLUP);
  pinMode(greenPin, INPUT_PULLUP);
  pinMode(redPin, INPUT_PULLUP);
}

void loop()
{
  if (digitalRead(redPin) == LOW) {
    lcd.setCursor(0, 1);
    lcd.print("red          ");
    return;
  } else if (digitalRead(greenPin) == LOW) {
    lcd.setCursor(0, 1);
    lcd.print("green        ");
    return;
  } else if (digitalRead(bluePin) == LOW) {
    lcd.setCursor(0, 1);
    lcd.print("blue         ");
  } else {
    lcd.setCursor(0, 1);
    lcd.print("             ");
  }
  delay(100);
}