minified sound and removed unused assets

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

src/scenes/Preload.js

@@ -19,9 +19,6 @@ import menutiles from "../assets/menu.png";
 import buttontiles from "../assets/buttons.png";
 import batFly from "../assets/BatFly.png";
 import batDie from "../assets/BatDie.png";
-import item_01 from "../assets/items/itemshard_01.png";
-import item_02 from "../assets/items/itemshard_02.png";
-import item_03 from "../assets/items/itemshard_03.png";
 import heal from "../assets/items/heal.png";
 import slow from "../assets/items/slow.png";
 import speed from "../assets/items/speed.png";
@@ -33,8 +30,8 @@ import arrow from "../assets/arrow.png";
 
 import menu_click from "../assets/audio/menu_click.wav";
 import menu_hover from "../assets/audio/menu_hover.wav";
-import background_start from "../assets/audio/background_start.wav";
+import background_start from "../assets/audio/background_start.mp3";
-import background_loop from "../assets/audio/background_loop.wav";
+import background_loop from "../assets/audio/background_loop.mp3";
 import attack_a from "../assets/audio/attack_a.wav";
 import attack_b from "../assets/audio/attack_b.wav";
 
@@ -47,9 +44,6 @@ export default class Preload extends Phaser.Scene {
     preload() {
         this.loadingScreen();
         this.load.image("logo", logoImg);
-        this.load.image("item_01", item_01);
-        this.load.image("item_02", item_02);
-        this.load.image("item_03", item_03);
         this.load.image("heart", heart);
         this.load.image("arrow", arrow);
         this.load.spritesheet('charA', charA, {frameWidth: 79, frameHeight: 63, margin: 1, spacing: 2});