diff --git a/01 - JavaScript Drum Kit/style.css b/01 - JavaScript Drum Kit/style.css
index bfdba84312..290ee0d1ce 100644
--- a/01 - JavaScript Drum Kit/style.css	
+++ b/01 - JavaScript Drum Kit/style.css	
@@ -12,13 +12,13 @@ body,html {
 
 .keys {
   display: flex;
-  flex: 1;
   min-height: 100vh;
   align-items: center;
   justify-content: center;
 }
 
 .key {
+  flex: 1;
   border: .4rem solid black;
   border-radius: .5rem;
   margin: 1rem;
diff --git a/03 - CSS Variables/index-FINISHED.html b/03 - CSS Variables/index-FINISHED.html
index b52b9f61af..36f5bf1ac6 100644
--- a/03 - CSS Variables/index-FINISHED.html	
+++ b/03 - CSS Variables/index-FINISHED.html	
@@ -19,7 +19,7 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
     <input id="base" type="color" name="base" value="#ffc600">
   </div>
 
-  <img src="https://source.unsplash.com/7bwQXzbF6KE/800x500">
+  <img src="https://unsplash.it/800/500?image">
 
   <style>
     :root {
diff --git a/03 - CSS Variables/index-START.html b/03 - CSS Variables/index-START.html
index d5fcc3a2ae..d8df0044a8 100644
--- a/03 - CSS Variables/index-START.html	
+++ b/03 - CSS Variables/index-START.html	
@@ -19,7 +19,7 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
     <input id="base" type="color" name="base" value="#ffc600">
   </div>
 
-  <img src="https://source.unsplash.com/7bwQXzbF6KE/800x500">
+  <img src="https://unsplash.it/800/500?image">
 
   <style>
 
diff --git a/05 - Flex Panel Gallery/index-FINISHED.html b/05 - Flex Panel Gallery/index-FINISHED.html
index 85c33c1ee2..fffd8c7645 100644
--- a/05 - Flex Panel Gallery/index-FINISHED.html	
+++ b/05 - Flex Panel Gallery/index-FINISHED.html	
@@ -51,11 +51,11 @@
       flex-direction: column;
     }
 
-    .panel1 { background-image:url(https://source.unsplash.com/gYl-UtwNg_I/1500x1500); }
-    .panel2 { background-image:url(https://source.unsplash.com/rFKUFzjPYiQ/1500x1500); }
-    .panel3 { background-image:url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?ixlib=rb-0.3.5&q=80&fm=jpg&crop=faces&cs=tinysrgb&w=1500&h=1500&fit=crop&s=967e8a713a4e395260793fc8c802901d); }
-    .panel4 { background-image:url(https://source.unsplash.com/ITjiVXcwVng/1500x1500); }
-    .panel5 { background-image:url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500); }
+    .panel1 { background-image: url(https://images.unsplash.com/photo-1443891238287-325a8fddd0f7?w=1500&h=1500); }
+    .panel2 { background-image: url(https://cdn.pixabay.com/photo/2017/08/07/16/48/green-2605621_1280.jpg); }
+    .panel3 { background-image: url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?w=1500&h=1500); }
+    .panel4 { background-image: url(https://images.unsplash.com/photo-1442522772768-9032b6d10e3e?w=1500&h=1500); }
+    .panel5 { background-image: url(https://images.unsplash.com/photo-1465156799763-2c087c332922?w=1500&h=1500); }
 
     /* Flex Items */
     .panel > * {
diff --git a/05 - Flex Panel Gallery/index-START.html b/05 - Flex Panel Gallery/index-START.html
index 88a4f1d1e2..32c8641b19 100644
--- a/05 - Flex Panel Gallery/index-START.html	
+++ b/05 - Flex Panel Gallery/index-START.html	
@@ -46,11 +46,11 @@
       background-position: center;
     }
 
-    .panel1 { background-image:url(https://source.unsplash.com/gYl-UtwNg_I/1500x1500); }
-    .panel2 { background-image:url(https://source.unsplash.com/rFKUFzjPYiQ/1500x1500); }
-    .panel3 { background-image:url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?ixlib=rb-0.3.5&q=80&fm=jpg&crop=faces&cs=tinysrgb&w=1500&h=1500&fit=crop&s=967e8a713a4e395260793fc8c802901d); }
-    .panel4 { background-image:url(https://source.unsplash.com/ITjiVXcwVng/1500x1500); }
-    .panel5 { background-image:url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500); }
+    .panel1 { background-image: url(https://images.unsplash.com/photo-1443891238287-325a8fddd0f7?w=1500&h=1500); }
+    .panel2 { background-image: url(https://cdn.pixabay.com/photo/2017/08/07/16/48/green-2605621_1280.jpg); }
+    .panel3 { background-image: url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?w=1500&h=1500); }
+    .panel4 { background-image: url(https://images.unsplash.com/photo-1442522772768-9032b6d10e3e?w=1500&h=1500); }
+    .panel5 { background-image: url(https://images.unsplash.com/photo-1465156799763-2c087c332922?w=1500&h=1500); }
 
     /* Flex Children */
     .panel > * {
diff --git a/20 - Speech Detection/index-FINISHED.html b/20 - Speech Detection/index-FINISHED.html
index e538b87b76..3ed61c0141 100644
--- a/20 - Speech Detection/index-FINISHED.html	
+++ b/20 - Speech Detection/index-FINISHED.html	
@@ -36,7 +36,7 @@
       }
   });
 
-  recognition.addEventListener('end', recognition.start);
+  recognition.addEventListener('end', () => recognition.start());
 
   recognition.start();
 
diff --git a/24 - Sticky Nav/style-FINISHED.css b/24 - Sticky Nav/style-FINISHED.css
index 0f8df57cb9..2d36a02ba1 100644
--- a/24 - Sticky Nav/style-FINISHED.css	
+++ b/24 - Sticky Nav/style-FINISHED.css	
@@ -31,7 +31,7 @@ body.fixed-nav .site-wrap {
 
 header {
   text-align: center;
-  height: 50vh;
+  height: 500px;
   background: url(https://source.unsplash.com/GKN6rpDr0EI/960x640) bottom center no-repeat;
   background-size: cover;
   display: flex;
diff --git a/24 - Sticky Nav/style-START.css b/24 - Sticky Nav/style-START.css
index ef2bc15845..0049a2f597 100644
--- a/24 - Sticky Nav/style-START.css	
+++ b/24 - Sticky Nav/style-START.css	
@@ -27,7 +27,7 @@ body {
 
 header {
   text-align: center;
-  height: 50vh;
+  height: 500px;
   background: url(https://source.unsplash.com/GKN6rpDr0EI/960x640) bottom center no-repeat;
   background-size: cover;
   display: flex;
diff --git a/25 - Event Capture, Propagation, Bubbling and Once/index-START.html b/25 - Event Capture, Propagation, Bubbling and Once/index-START.html
index 35783bff72..1b0c2bdf63 100644
--- a/25 - Event Capture, Propagation, Bubbling and Once/index-START.html	
+++ b/25 - Event Capture, Propagation, Bubbling and Once/index-START.html	
@@ -41,7 +41,6 @@
   }
 </style>
 
-<button></button>
 <script>
 
 </script>
diff --git a/readme.md b/readme.md
index 4212cb16c8..87eced15bc 100644
--- a/readme.md
+++ b/readme.md
@@ -14,6 +14,7 @@ Feel free to submit a PR by adding a link to your own recaps, guides, or reviews
 * [Nitish Dayal's Text Guides](https://github.com/nitishdayal/JavaScript30) are great for those who like reading over watching.
 * [Thorsten Frommen](https://tfrommen.de/tag/javascript-30/) shares how he solved the exercises before viewing the answers.
 * [Soyaine 写的中文指南](https://github.com/soyaine/JavaScript30)包含了过程记录和难点解释
+* [Aaron的语雀学习小组](https://github.com/A-aronYang/JavaScript30)包含中文文档，案例和相关资料
 * [乔木 录制的讲解视频](https://b23.tv/pSa7rdu) 看中文讲解视频一起学习 Javascript30 吧! Javascript30 中 CSS/JS/HTML 视频讲解
 * [Ayo Isaiah's](https://freshman.tech/archive/#javascript30) Recaps and Lessons Learned.
 * [Adriana Rios](https://stpcollabr8nlstn.github.io/JavaScript30/) shares her alternative solutions.
@@ -56,6 +57,7 @@ Feel free to submit a PR by adding a link to your own recaps, guides, or reviews
 * [Stiaannel's](https://stiaannel.co.za/my-projects/javascript30) implementation of the Javascript30 challenge, with small design changes and a couple of extra features.
 * [Kelly CHI's](https://kellychi22.github.io/JavaScript30/) complete JavaScript30 challenges! Click the links to check demos and notes of each challenge. 🇹🇼 🌟
 * [Issam Seghir](https://issam-seghir.github.io/JavaScript30/)  added custom solutions and styles 🍧, improved performance, including fixed bugs/issus 💢. , added articles for each exercise 📝.
+* [Khush Gupta's](https://khushgupta14.github.io/JavaScript30/) implementation of the JavaScript30 challenge with custom UI and extended logic.
 
 ## Alternative Implementations
 Here are some links of people who have done the tutorials, but in a different language or framework: