• Arduino Board: In our example, we'll use the versatile ESP32, but other boards can work too.

• OLED Display: A 128x64 or 128x32 pixel OLED display with I2C or SPI interface.

• Pushbutton: This will serve as your trigger to shoot at the alien invaders.

• Potentiometer: You'll use this component to control the movement of your spaceship.

• Breadboard and Jumper Wires: Essential for connecting and prototyping your hardware.

• (Optional) Piezo Buzzer: For adding engaging sound effects to your game.

• Game Logic and Components

• Display Initialization: Initialize the OLED display to set the stage for rendering the game's graphics.

• Spaceship: Create your spaceship at the bottom of the display. The potentiometer controls its position on the X-axis.

• Alien Invaders: Populate the top of the display with alien invaders. These extraterrestrial foes move horizontally and descend systematically.

• Shooting Mechanism: Implement a shooting mechanism for your spaceship. Press the pushbutton to fire bullets at the invaders.

• Gameplay: Your objective is to shoot down the descending invaders. For every successful hit, your score increases. If an invader reaches the bottom of the screen or collides with your spaceship, you lose a life. Keep track of your score and remaining lives.

• Display Updates: Continually update the display to show the game's current state. Draw your spaceship, invaders, bullets, score, and lives.

• Game Over: Implement game-over conditions. When you run out of lives, display a "Game Over" message on the OLED screen. Allow players to restart by pressing a button.

• Game Loop: Set up a game loop that controls the frame rate, updates game elements, and handles player input.

• (Optional) Sound Effects: Add sound effects for shooting, alien movements, or game-over events using a piezo buzzer or a speaker.

/**************************************

* Project: Space Invaders Game

* Author: Shakil Tanvir

* Date: 24 October 2023

* Copyright © 20[XX] Shakil Tanvir. All rights reserved.

* Permission is hereby granted for personal and educational use only.

* Commercial use of this code or any derivative works is strictly prohibited without written consent from the author.

* Make Sure the pin no and your ADC chanel is 10bit or you can map your adc values from the code

**************************************/

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128

#define SCREEN_HEIGHT 64

// Initialize the OLED display

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// Spaceship variables

int spaceshipX = SCREEN_WIDTH / 2;

int spaceshipY = SCREEN_HEIGHT - 10;

int spaceshipWidth = 10;

int spaceshipHeight = 5;

// Bullet variables

int bulletX;

int bulletY;

int bulletSpeed = 2;

boolean bulletFired = false;

// Alien invader variables

int alienX = random(0, SCREEN_WIDTH);

int alienY = 0;

int alienSpeed = 1;

int alienWidth = 10;

int alienHeight = 5;

// Game variables

int score = 0;

int lives = 3;

// Button and potentiometer pins

int buttonPin = 2; // Change to the pin you're using

int potentiometerPin = A0; // Change to the pin you're using

void setup() {

  display.begin(SSD1306_I2C_ADDRESS, 4, 5);

  display.display();

  display.clearDisplay();

  display.setTextSize(1);

  display.setTextColor(SSD1306_WHITE);

  display.setCursor(0, 0);

  display.print("Space Invaders");

  display.display();

  delay(2000); // Display the title for 2 seconds

  // Initialize the button pin

  pinMode(buttonPin, INPUT);

}

void loop() {

  // Read the potentiometer value to move the spaceship

  int potValue = analogRead(potentiometerPin);

  spaceshipX = map(potValue, 0, 1023, 0, SCREEN_WIDTH - spaceshipWidth);

  // Check if the button is pressed to fire a bullet

  if (digitalRead(buttonPin) == HIGH && !bulletFired) {

    bulletX = spaceshipX + spaceshipWidth / 2;

    bulletY = spaceshipY;

    bulletFired = true;

  }

  // Move the bullet

  if (bulletFired) {

    bulletY -= bulletSpeed;

    if (bulletY < 0) {

      bulletFired = false;

    }

  }

  // Move the alien invader

  alienY += alienSpeed;

  if (alienY > SCREEN_HEIGHT) {

    alienX = random(0, SCREEN_WIDTH);

    alienY = 0;

  }

  // Check for collisions

  if (collide(bulletX, bulletY, 2, 2, alienX, alienY, alienWidth, alienHeight)) {

    score++;

    alienX = random(0, SCREEN_WIDTH);

    alienY = 0;

    bulletFired = false;

  }

  if (collide(spaceshipX, spaceshipY, spaceshipWidth, spaceshipHeight, alienX, alienY, alienWidth, alienHeight)) {

    lives--;

    alienX = random(0, SCREEN_WIDTH);

    alienY = 0;

  }

  // Clear the display

  display.clearDisplay();

  // Draw game elements

  display.drawRect(spaceshipX, spaceshipY, spaceshipWidth, spaceshipHeight, SSD1306_WHITE);

  display.drawCircle(bulletX, bulletY, 2, SSD1306_WHITE);

  display.drawRect(alienX, alienY, alienWidth, alienHeight, SSD1306_WHITE);

  // Display score and lives

  display.setCursor(0, 0);

  display.print("Score: ");

  display.print(score);

  display.setCursor(SCREEN_WIDTH - 50, 0);

  display.print("Lives: ");

  display.print(lives);

  display.display();

  // Check for game over

  if (lives <= 0) {

    display.clearDisplay();

    display.setTextSize(2);

    display.setCursor(20, SCREEN_HEIGHT / 2 - 10);

    display.print("Game Over");

    display.display();

    delay(2000); // Display "Game Over" for 2 seconds

    resetGame();

  }

  delay(20); // Adjust the game speed by changing the delay

}

boolean collide(int x1, int y1, int w1, int h1, int x2, int y2, int w2, int h2) {

  return (x1 + w1 >= x2 && x1 <= x2 + w2 && y1 + h1 >= y2 && y1 <= y2 + h2);

}

void resetGame() {

  score = 0;

  lives = 3;

  spaceshipX = SCREEN_WIDTH / 2;

  alienX = random(0, SCREEN_WIDTH);

  alienY = 0;

  display.clearDisplay();

}

Design the visual elements of your game, including the spaceship, aliens, bullets, and any additional graphics you'd like to include. Utilize simple shapes or images to represent these elements on the OLED display.