diff --git a/src/ScoreDisplay.js b/src/ScoreDisplay.js
index 7cffb31..f057678 100644
--- a/src/ScoreDisplay.js
+++ b/src/ScoreDisplay.js
@@ -1,32 +1,28 @@
 import { BULLET_SIZE, FONT_SIZE, TOT_SHOTS } from './Constants.js';
-import { Gun } from './Gun.js';
-import { Target } from './Target';
-
 import bullet from '../data/bullet.png';
 
 
 class ScoreDisplay {
   constructor(initialBullets) {
-    this.bulletImg = null;
+    this.img = null;
     this.shotLeft = initialBullets;
     this.score = 0;
 
-    loadImage(bullet, (img) => {
-      this.bulletImg = img;
+    loadImage(bullet, (PImage) => {
+      this.img = PImage;
     });
   }
 
   draw() {
-    // Draw score on top-left
+    // score
     textFont('Arial');
     textSize(25);
     fill(255, 0, 0);
     textAlign(LEFT, TOP);
     text(`Score: ${this.score}`, 10, 10);
 
-    if (!this.bulletImg) return;
-
-    // Draw remaining bullets on top-right
+    // bullets
+    if (!this.img) return;
     const bulletSpacing = 20;
     const marginRight = 10;
     const bulletsWidth = this.shotLeft * bulletSpacing;
@@ -34,18 +30,30 @@ class ScoreDisplay {
     let y = 10;
 
     for (let i = 0; i < this.shotLeft; i++) {
-      image(this.bulletImg, startX + i * bulletSpacing, y, BULLET_SIZE, BULLET_SIZE);
+      image(this.img, startX + i * bulletSpacing, y, BULLET_SIZE, BULLET_SIZE);
     }
 
   }
 
+  resetScore() {
+    this.score = 0;
+  }
+
+  addScore(scoreToAdd) {
+    this.score += scoreToAdd;
+  }
+
+  setBullets(numBullets) {
+    this.shotLeft = numBullets;
+  }
+
   update(source, ...others) {
     if (source === 'gun') {
       const [, , remainingShots] = others;
-      this.shotLeft = remainingShots;
+      this.setBullets(remainingShots);
     } else if (source === 'target-hit') {
       const [points] = others;
-      this.score += points;
+      this.addScore(points);
     }
   }
 }
diff --git a/src/Subject.js b/src/Subject.js
index 4defcce..ebd0bb0 100644
--- a/src/Subject.js
+++ b/src/Subject.js
@@ -23,5 +23,4 @@ class Subject {
   }
 }
 
-
 export { Subject };
diff --git a/src/main.js b/src/main.js
index 8170479..2a21ca0 100644
--- a/src/main.js
+++ b/src/main.js
@@ -27,7 +27,6 @@ function setup() {
     gun.subscribe(target);
     target.subscribe(score);
   }
-
 }
 
 
@@ -63,8 +62,8 @@ function keyPressed() {
 // init the targets
 function initTargets() {
   // Create new targets from the factory
-  // Remember to unsubscribe the previous targets and to subscribe the new ones
   const factory = TargetFactory.getInstance();
+  // Remember to unsubscribe the previous targets and to subscribe the new ones
   gun.unsubscribeAll();
 
   targets = factory.getRandomTargets(MAX_TARGETS, TARGET_WIDTH, 200);