JavaScript Block Game

https://editor.p5js.org/guldus/full/r1G7x-SW4

         var box = [];
         var block;
				 var score = 0;
         function setup() {
             createCanvas(500, 500);
             for (var i = 0; i < 20; i++) {
                 box[i] = new Box();
             }
             block = new Block();
             textSize(22);
             textFont("Thoma")
         }
         function keyPressed() {
             if (keyCode === LEFT_ARROW) {
                 if (block.x != 0) block.move(-25)
             } else if (keyCode === RIGHT_ARROW) {
                 if (block.x != width - block.blockLength) block.move(25)
             }
         }
         function gameOver() {
             for (var i = 0; i < 20; i++) {
                 if (box[i].y + 25 == block.y) {
                     for (var j = 1; j < (block.blockLength) / 25; j++) {
                         if (box[i].x == block.x + j * 25 || box[i].x + 25 == block.x + j * 25) {
                             noLoop();
													 fill(255,0,0);
													 text("game over",width/2-60,100);
													 break
                         }
                     }
                 }
             }
         }

         function draw() {
             background(160);
             for (var i = 0; i < 20; i++) {
                 box[i].fall();
                 box[i].show();
             }
             block.show();
             gameOver();
					   fill(255,255,0);
					 	 text("Score: "+score,30,50 )
         }
         function Box() {
             this.x = floor(random(0, 25)) * 25;
             this.y = floor(random(-25, 0)) * 25;
             this.ySpeed = 2.5;
             this.fall = function () {
                 this.y += this.ySpeed;
                 if (this.y > height) {
                     this.x = floor(random(0, 25)) * 25;
                     this.y = floor(random(-25, 0)) * 25;
									   score +=1;
                 }
             }
             this.show = function () {
                 fill(255, 0, 0);
                 rect(this.x, this.y, 25, 25);//x position, y position, height, width
             }
         }
         function Block() {
             this.blockLength = 100;
             this.x = (width - this.blockLength) / 2;
             this.y = height - 25;
             //this.xSpeed = 3.5;,
             this.move = function (xSpeed) {
                 this.x += xSpeed;
             }
             this.show = function () {
                 fill(0, 255, 0);
                 rect(this.x, this.y, this.blockLength, 25)
             }
         }

https://editor.p5js.org/guldus/sketches/r1G7x-SW4