diff --git a/main.js b/main.js
index f8488cf..08901e5 100644
--- a/main.js
+++ b/main.js
@@ -31,7 +31,7 @@ function createWindow () {
   win.loadFile(path.join("html/game.html"));
 
   // Open the DevTools.
-  // win.webContents.openDevTools();
+  win.webContents.openDevTools();
 }
 
 // This method will be called when Electron has finished
diff --git a/src/entities/chest.js b/src/entities/chest.js
index 40ab61d..8eae900 100644
--- a/src/entities/chest.js
+++ b/src/entities/chest.js
@@ -8,6 +8,9 @@ const sounds = {
   obtain: new Sound(__dirname + "/../../res/sounds/obtain.wav", { volume: 0.1 })
 };
 
+const TextBox = require(__dirname + "/../helpers/textbox.js");
+const text = require(__dirname + "/../../res/lang/default.js");
+
 const Pointer = require("./pointer.js");
 
 const state = {
@@ -68,6 +71,7 @@ class Chest extends TileSprite {
           this.state = state.open;
           this.pressed = true;
           this.action();          
+          this.level.entities.add(new TextBox(text.game.keyFind, 2.5));
           sounds.obtain.play();
         } else {
           if (!sounds.forbidden.playing && !this.pressed) {
diff --git a/src/entities/portal.js b/src/entities/portal.js
index f1700e8..8f76438 100644
--- a/src/entities/portal.js
+++ b/src/entities/portal.js
@@ -10,7 +10,7 @@ const sounds = {
 var Pointer = require("./pointer.js");
 
 class Portal extends TileSprite {
-  constructor(pos, player, keys, level, type, action, key) {
+  constructor(pos, player, keys, level, type, action, key = "") {
     super(texture, 32, 32);
     this.pos = pos;
     this.scale = { x: 1, y: 1 };
diff --git a/src/helpers/textbox.js b/src/helpers/textbox.js
new file mode 100644
index 0000000..0029249
--- /dev/null
+++ b/src/helpers/textbox.js
@@ -0,0 +1,34 @@
+var asdf = require("asdf-games");
+// eslint-disable-next-line no-unused-vars
+const { Container, Text, Rect } = asdf;
+
+const fillStyle = {fill: "#ffffff", font: "16px Minecraft"};
+
+class TextBox extends Container {
+  constructor(string, lifespan) {
+    super();
+    this.pos = { x: 0, y: 0 };
+    this.string = string;
+    this.lifespan = lifespan;
+    
+    const background = new Rect(640, 24, {fill: "rgba(0,0,0,0.5)"});
+    background.pos = { x: 0, y: 0 };
+    this.add(background);
+
+    const text = new Text(string, fillStyle);
+    text.pos = { x: 8, y: 18 };
+    this.add(text);
+  }
+
+  update(dt) {
+    super.update(dt);
+
+    if (this.lifespan <= 0) {
+      this.dead = true;
+    } else {
+      this.lifespan -= dt;
+    }
+  }
+}
+
+module.exports = TextBox;
\ No newline at end of file