added item chests, audio and deployment

Signed-off-by: Pascal Syma <pascal@syma.dev>

src/entities/Chest.js

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2020. Antonio Martinez Casadesus and Pascal Syma.
+ * All rights reserved.
+ */
+
+import Interactable from "./Interactable";
+import Item from "./Item";
+
+export default class Chest extends Interactable {
+
+    constructor(scene, item) {
+        super(scene, item.x, item.y, 'chest');
+
+        this.setFrame(4);
+        this.body.setAllowGravity(false);
+        this.setOrigin(0.5, 1);
+
+        this.setData('opened', false);
+    }
+
+
+    canInteract() {
+        return !this.getData('opened');
+    }
+
+    interact() {
+        super.interact();
+        this.setData('opened', true);
+
+        this.play('chest_open');
+
+        const options = [/*"slow", "speed", "storm", */"heal"];
+
+        let item = new Item(this.scene, {
+            x: this.x,
+            y: this.y - this.height
+        }, options[Math.floor(Math.random() * options.length)])
+
+        this.scene.interactables.add(item);
+    }
+}