diff --git a/src/NonPlayer.java b/src/NonPlayer.java
index 70f6714..9176d10 100644
--- a/src/NonPlayer.java
+++ b/src/NonPlayer.java
@@ -1,6 +1,5 @@
-/* Eric Li, ICS4U, Completed 6/19/2022
-
-NonPlayer class defines behaviour for enemies and characters that are not controlled by the player */
+// Eric Li, Charlie Zhao, ICS4U, Completed 6/19/2022
+// the NonPlayer class defines behaviour for enemies and characters that are not controlled by the player
 
 import javax.sound.sampled.LineUnavailableException;
 import javax.sound.sampled.UnsupportedAudioFileException;
@@ -9,25 +8,24 @@ import java.io.IOException;
 import java.io.Serializable;
 
 public class NonPlayer extends GenericSprite implements Serializable {
-  // please note that these are not static, in contrast to the player class, as different enemies will have different heights
+  // please note that these are not static, in contrast to the player class
+  // as different enemies have different heights
   public int npcWidth;
   public int npcHeight;
   public int currentXDirection, currentYDirection;
   public boolean isDead;
 
   public int realX;
-
   public int health;
 
   public double fadeCounter;
 
   public BufferedImageWrapper[][][] spriteArray;
-  public NonPlayer(int x, int y, BufferedImageWrapper[][][] sprites, int npcWidth, int npcHeight, int health) throws UnsupportedAudioFileException, LineUnavailableException, IOException {
+
+  public NonPlayer(int x, int y, BufferedImageWrapper[][][] sprites, int npcWidth, int npcHeight, int health) {
     super(x, y, npcHeight, npcWidth);
-    // bump = new Sound("sound/bump.wav");
     this.health = health;
     spriteArray = sprites;
-    // TODO: remove
     this.npcWidth = npcWidth;
     WIDTH = npcWidth;
     this.npcHeight = npcHeight;
@@ -37,63 +35,73 @@ public class NonPlayer extends GenericSprite implements Serializable {
     fadeCounter = 1;
   }
 
-
+  // check if the player is colliding with the enemy
   public boolean collidePlayer(Player p){
-    if(realX+npcWidth>p.x&&realX<p.x+Player.PLAYER_WIDTH&&y-p.y<Player.PLAYER_HEIGHT&&p.y-y<npcHeight){
-      return true;
-    }
-    return false;
+    return realX + npcWidth > p.x && realX < p.x + Player.PLAYER_WIDTH && y - p.y < Player.PLAYER_HEIGHT && p.y - y < npcHeight;
   }
 
-
+  // update the realX value of the enemy (this is dependent on camera.x and is the x position seen by the player)
   public void update(){
     realX = x-GameFrame.game.camera.x;
   }
+
+  // move the enemy
   public void move() throws UnsupportedAudioFileException, LineUnavailableException, IOException {
+    // don't move the enemy if the enemy is dead
     if (isDead) {
       xVelocity = 0;
-     // return;
     }
+    // have the enemy go the opposite direction if the enemy would be colliding with a tile
     if(!canUpdate(xVelocity, 0)){
       xVelocity*=-1;
     }
+    // have the enemy stop falling if they are on the ground
     if(!canUpdate(0, yVelocity)){
       if(yVelocity>0){
         while(canUpdate(0,1)){
           y+=1;
         }
         isGrounded = true;
-      } else if(yVelocity<0){
+      } else if(yVelocity<0){ // have the enemy stop moving up if they hit something above them
         while(canUpdate(0,-1)){
           y-=1;
         }
       }
       yVelocity = 0;
     }
+    // move the object yVelocity and xVelocity pixels away from their current position
     if(canUpdate(0, yVelocity)) {
       y = y + (int) yVelocity;
       x = x + (int) xVelocity;
     }
+    // simulate gravity
     if(!isGrounded) {
       yVelocity += 0.3;
     }
+    // cap maximum speed
     capSpeed();
   }
 
   public int draw(Graphics g, int frame) {
+    // if the enemy is not dead, animate the enemy sprite by cycling through the frames of the enemy
     if (!isDead) {
       // last frame is reserved for death animation
       frame %= spriteArray[0][0].length - 1;
+      // save the current x and y directions so the enemy is facing the right way if it dies
       currentXDirection = (int)(Math.signum(xVelocity) + 1) / 2;
       currentYDirection = (int)(Math.signum(yVelocity) + 1) / 2;
       // x-GameFrame.game.camera.x is used as the camera doesn't follow NPCs
+      // draw the enemy
       g.drawImage(spriteArray[currentXDirection][currentYDirection][frame].image, x-GameFrame.game.camera.x, y, null);
       return 1;
     } else {
+      // fade the enemy slowly by overlaying a composite on the enemy
       ((Graphics2D)g).setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, (float)fadeCounter));
+      // draw faded enemy
       g.drawImage(spriteArray[currentXDirection][currentYDirection][spriteArray[0][0].length-1].image, x-GameFrame.game.camera.x, (int)(y+HEIGHT/1.7), null);
       // reset composite to not affect other sprites being drawn
       ((Graphics2D)g).setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1));
+      // increase the amount of fade every tick to a maximum fade amount of 100% (total transparency)
       fadeCounter = Math.max(0, fadeCounter-0.01);
       return 0;
     }
diff --git a/src/Particle.java b/src/Particle.java
index c0734b0..b54f1e9 100644
--- a/src/Particle.java
+++ b/src/Particle.java
@@ -1,10 +1,11 @@
+// Eric Li, Charlie Zhao, ICS4U, Finished 6/18/22
+// create particles when the character jumps or on top of lava
+
 import java.awt.*;
 import java.io.IOException;
 import java.io.Serializable;
 
 public class Particle extends GenericSprite implements Serializable {
-    public static final int small = 3;
-    public static final int big = 10;
 
     public int xVelocity;
 
diff --git a/src/Player.java b/src/Player.java
index 545b4b3..785a174 100644
--- a/src/Player.java
+++ b/src/Player.java
@@ -1,6 +1,5 @@
-/* Eric Li, ICS4U, Completed 5/29/2022
-
-Paddle class defines behaviours for the left and right player-controlled paddles */
+// Eric Li, Charlie Zhao, ICS4U, Completed 6/20/2022
+// Player class defines behaviours for the player controlled character
 
 import javax.sound.sampled.LineUnavailableException;
 import javax.sound.sampled.UnsupportedAudioFileException;