diff --git a/src/asset_editor.js b/src/asset_editor.js
index c465303..a10e24a 100644
--- a/src/asset_editor.js
+++ b/src/asset_editor.js
@@ -8,6 +8,7 @@ export class AssetEditor {
         this.toggleButton = rootEl.querySelector("#toggle-asset-editor-button");
         this.container = rootEl;
         this.previewedName = null;
+        this.changeEventHandlers = [];
 
         if (localStorage.getItem("asset-editor-expanded")) {
             this.editor.style.display = "block";
@@ -32,6 +33,16 @@ export class AssetEditor {
         });
     }
 
+    addChangeListener(callback) {
+        this.changeEventHandlers.push(callback);
+    }
+
+    #emitChange() {
+        for (const handler of this.changeEventHandlers) {
+            handler();
+        }
+    }
+
     getAssets() {
         return this.store.getAll();
     }
@@ -43,6 +54,7 @@ export class AssetEditor {
             await this.addAsset({ name: asset.name, file: asset.file });
         }
 
+        this.#emitChange();
         this.renderList();
     }
 
@@ -76,12 +88,14 @@ export class AssetEditor {
     async addAsset({ name, file }) {
         await this.store.add(name, file);
 
+        this.#emitChange();
         this.renderList();
     }
 
     async deleteAsset(name) {
         await this.store.delete(name);
 
+        this.#emitChange();
         this.renderList();
     }
 
diff --git a/src/html_exporter.js b/src/html_exporter.js
index d940ee5..a1eab74 100644
--- a/src/html_exporter.js
+++ b/src/html_exporter.js
@@ -24,6 +24,7 @@ export class HtmlExporter {
         <title>${projectName}</title>
         <style>
             body {
+                background-color: black;
                 display: flex;
                 justify-content: center;
                 align-items: center;
@@ -49,7 +50,7 @@ export class HtmlExporter {
                 }
             }
 
-            const gamelib = new Gamelib(console, null, new AssetProvider(), document.querySelector('canvas'));
+            const gamelib = new Gamelib(console, new AssetProvider(), document.querySelector('canvas'));
 
             window.karlkoder = {
                 lib() {
diff --git a/src/index.js b/src/index.js
index 12ac792..071161c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -6,13 +6,10 @@ import { CodeRunner } from "./code_runner.js";
 import { AssetEditor } from "./asset_editor.js";
 import { AssetProvider } from "./asset_provider.js";
 import { Gamelib } from "./gamelib.js";
-import { KarlkoderCodec } from "./karlkoder_codec.js";
-import { promptUpload } from "./prompt_upload.js";
 import { GamelibCompleter } from "./gamelib_completer.js";
 import { TextCompleter } from "./text_completer.js";
 import { ConsoleInput } from "./console_input.js";
-import { downloadFile, slugify } from "./utils.js";
-import { HtmlExporter } from "./html_exporter.js";
+import { ProjectSaveHandler } from "./project_save_handler.js";
 
 const editor = ace.edit("editor");
 editor.setTheme("ace/theme/gruvbox");
@@ -43,8 +40,6 @@ const assetProvider = new AssetProvider();
 
 const assetEditor = new AssetEditor(document.querySelector("#asset-editor-container"), []);
 
-const htmlExporter = new HtmlExporter(assetProvider);
-
 const gamelib = new Gamelib(
     playgroundConsole.getAdapter(),
     assetProvider,
@@ -68,6 +63,8 @@ const saveButton = document.querySelector("#save-button");
 const loadButton = document.querySelector("#load-button");
 const exportButton = document.querySelector("#export-button");
 
+const projectSaveHandler = new ProjectSaveHandler(editor, assetEditor, assetProvider, projectName);
+
 const sessionSaveDebounce = new Debounce(1000);
 editor.addEventListener("change", () => {
     sessionSaveDebounce.run(() => {
@@ -83,41 +80,6 @@ projectName.onchange = () => {
     sessionStorage.setItem("project-name", projectName.value);
 };
 
-loadButton.onclick = async () => {
-    const files = await promptUpload(".karlkode", false);
-    if (files.length === 0) {
-        return;
-    }
-    if (files.length > 1) {
-        throw new Error(
-            `unreachable: something went wrong ! files.length > 1 : files.length = ${files.length}`,
-        );
-    }
-    const items = KarlkoderCodec.de(
-        await fetch(URL.createObjectURL(files[0])).then((x) => x.bytes()),
-    );
-    const assets = items
-        .filter((x) => x.tag === "asset")
-        .map((x) => {
-            delete x.tag;
-            return x;
-        });
-    const code = items.find((x) => x.tag === "code");
-    delete code.tag;
-
-    assetEditor.importAssets(
-        assets.map(({ name, mime, content }) => {
-            const file = new File([content], name, { type: mime });
-
-            return { name, file };
-        }),
-    );
-
-    projectName.value = code.name;
-    const dec = new TextDecoder();
-    editor.setValue(dec.decode(code.content));
-};
-
 runButton.onclick = async () => {
     const code = editor.getValue();
 
@@ -139,29 +101,21 @@ runButton.onclick = async () => {
 };
 
 exportButton.onclick = async () => {
-    const html = await htmlExporter.export(projectName.value, editor.getValue());
-
-    downloadFile(slugify(projectName.value) || "project", html, ".html", "text/html");
+    projectSaveHandler.exportProject();
 };
 
-async function saveKarlKoder() {
-    downloadFile(
-        slugify(projectName.value) || "project",
-        await KarlkoderCodec.en(
-            projectName.value,
-            editor.getValue(),
-            await assetEditor.getAssets(),
-        ),
-        ".karlkode",
-    );
-}
+loadButton.onclick = () => {
+    projectSaveHandler.loadFromFile();
+};
 
-saveButton.onclick = () => saveKarlKoder();
+saveButton.onclick = () => {
+    projectSaveHandler.saveFile();
+};
 
 addEventListener("keydown", (ev) => {
     if (ev.ctrlKey && ev.key === "s") {
         ev.preventDefault();
-        saveKarlKoder();
+        projectSaveHandler.saveFile();
     }
 });
 
diff --git a/src/utils.js b/src/utils.js
index 10f7202..0141a88 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -1,9 +1,4 @@
-export function downloadFile(name, content, extension, mime) {
-    const filename = prompt("Filename?", name);
-    if (!filename) {
-        return;
-    }
-
+export function downloadFile(filename, content, extension, mime) {
     const blob = new Blob([content], { type: mime });
     const url = URL.createObjectURL(blob);
 
@@ -29,6 +24,14 @@ export function slugify(text) {
 
 export function minifyJs(code) {
     return code
-        .replace(/[\s\n]+/g, " ")
-        .replace(/;\s+/g, ";");
+        .split("\n")
+        .map((line) =>
+            line
+                .replace(/\/\/.+$/, "")
+                .replace(/\) \{/, "){")
+                .replace(/ = /g, "=")
+                .trim()
+        )
+        .filter((line) => line.length > 0)
+        .join("\n");
 }