This is the classic Atari game called Pong, recreated by my son all on his own for the RBX. I am extremely proud of him!

Connect:

• OLED Display Brick to Port 4E
• Rotary Switch Brick to Port 2A and Port 4A
• Buzzer Brick to Port 2B

Run the following script:

var rs = new RotarySwitch(PORT_2A,PORT_4D);
var sc = new OledDisplay();
var buz = new Buzzer(PORT_2B);

function resetBall() {
  ballx = sc.width()/2;
  bally = sc.height()/2;
  bs = [3,3];
  bv = [bs[0],bs[1]];
}

function hit() {
  buz.playTone((Math.random()*100)+600, 80);
}

function scored() {
  buz.playNote(NOTE_E, 5, 250);
  buz.playNote(NOTE_A, 5, 250);
}

// variabes
var speed = 3;
var s = 1;
var b = 5;
var pheight = 24;
var score = [0,0];
var start = false;

// ai variables
var y1 = sc.height()/2-pheight/2;

// player variables
rs.setValue(sc.height()/2-pheight/2);
var y2 = rs.getValue();

// ball variables
var ballx = 16;
var bally = 16;
var bs = [3,3];
var bv = [bs[0],bs[1]];
var bw = 7;

sc.setFont(FONT_LARGE);
while (!start) {
  sc.drawString(6,32,"PRESS TO START");
  if (rs.clicked()) {
    start = true;
  }
  while(start) {
    sc.startBuffer();
    sc.clear();
   
    // get player y position
    y2 += rs.getDelta()*speed;
    if (y2 < 0) {
      y2 = 0;
    }
    if (y2 > sc.height()-pheight) {
      y2 = sc.height()-pheight;
    }
       
    // set ai y position to ball y position
    if (bally-pheight/2 > y1) {
      y1 += speed;
    }
    else if (bally-pheight/2 < y1) {
      y1 -= speed;
    }
       
    // draw bg
    sc.drawLine(sc.width()/2,0,sc.width()/2,sc.height());
    // draw score
    sc.drawString(sc.width()/2-16,10,score[0].toString());
    sc.drawString(sc.width()/2+8,10,score[1].toString());
       
    // draw ai
    sc.drawRect(2,y1,5,pheight,filled=true);
    // draw player
    sc.drawRect(121,y2,5,pheight,filled=true);
    // draw ball
    sc.drawEllipse(ballx,bally,3,3,filled=true);
       
    // ball velocity
    ballx += bv[0];
    bally += bv[1];
       
    // ball wall collision
    if (ballx > sc.width()-b) {
      resetBall();
      scored();
      score[0] += 1;
    }
    else if (ballx < b) {
      resetBall();
      scored();
      score[1] += 1;
    }  
    if (bally > sc.height()-b) {
      bv[1] = -bs[1];
    }
    else if (bally < b) {
      bv[1] = bs[1];
    }
       
    // ball paddle collision
    if ((ballx > 121 && ballx < 128) || (ballx+bw > 121 && ballx+bw < 128)) {
      if ((bally > y2 && bally < y2+pheight) || (bally+bw > y2 && bally+bw < y2+pheight)) {
        hit();
        ballx = 116;
        bv[0] = -bs[0];
        if (bs[0] < 6) {
          bs[0] += s;
          bs[1] += s/4;
        }
      }    
    }
    if ((ballx > 0 && ballx < 12) || (ballx+bw > 0 && ballx+bw < 12)) {
      if ((bally > y1 && bally < y1+pheight) || (bally+bw > y1 && bally+bw < y1+pheight)) {
        hit();
        ballx = 12;
        bv[0] = bs[0];
        if (bs[0] < 7) {
          bs[0] += s;
          bs[1] += s/4;
        }
      }    
    }    
       
    sc.flushBuffer();
  }
}

Here is the game in action: