diff --git a/script.js b/script.js
index 293a6c0..454755e 100644
--- a/script.js
+++ b/script.js
@@ -9,21 +9,38 @@
         constructor(game) {
             this.game = game;
             window.addEventListener('keydown', e => {
-                if ((e.key === 'ArrowUp') && (this.game.keys.indexOf(e.key) === -1)) {
+                if (((e.key === 'ArrowUp') || (e.key === 'ArrowDown') )
+                    && (this.game.keys.indexOf(e.key) === -1)) {
                     this.game.keys.push(e.key);
+                } else if ( e.key === ' ' ) {
+                    this.game.player.shootTop();
                 }
-                console.log(this.game.keys);
             });
             window.addEventListener('keyup', e => {
                 if (this.game.keys.indexOf(e.key) > -1) {
                     this.game.keys.splice(this.game.keys.indexOf(e.key), 1);
                 }
-                console.log(this.game.keys);
             });
         }
     }
     class Projectile {
-
+        constructor(game, x, y) {
+            this.game = game;
+            this.x = x;
+            this.y = y;
+            this.width = 10;
+            this.height = 3;
+            this.speed = 3;
+            this.markedForDeletion = false;
+        }
+        update() {
+            this.x += this.speed;
+            if (this.x > this.game.wdith * 0.8) { this.markedForDeletion = true; }
+        }
+        draw(context) {
+            context.fillStyle = 'yellow';
+            context.fillRect(this.x, this.y, this.width, this.height);
+        }
     }
     class Particle {
 
@@ -36,12 +53,33 @@
             this.x = 20;
             this.y = 100;
             this.speedY = 0;
+            this.maxSpeed = 2;
+            this.projectiles = [];
         }
         update() {
+            if (this.game.keys.includes('ArrowUp')) { this.speedY = -this.maxSpeed}
+            else if (this.game.keys.includes('ArrowDown')) { this.speedY = this.maxSpeed}
+            else { this.speedY = 0; }
             this.y += this.speedY;
+            // handle projectiles
+            this.projectiles.forEach(projectile => {
+                projectile.update();
+            });
+            this.projectiles = this.projectiles.filter(projectile => !projectile.markedForDeletion);
         }
         draw(context) {
+            context.fillStyle = 'black';
             context.fillRect(this.x, this.y, this.width, this.height);
+            this.projectiles.forEach(projectile => {
+                projectile.draw(context);
+            });
+        }
+        shootTop() {
+            if ( this.game.ammo > 0 ) {
+                this.projectiles.push(new Projectile(this.game, this.x + 80, this.y + 30));
+                this.game.ammo--;
+            }
+
         }
     }
     class Enemy {
@@ -63,6 +101,7 @@
             this.player = new Player(this);
             this.input = new InputHandler(this);
             this.keys = [];
+            this.ammo = 20;
         }
         update() {
             this.player.update();