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diff --git a/assets/projects/math-tools.png b/assets/projects/math-tools.png
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diff --git a/index.html b/index.html
index 7a91ea5..8c0892d 100644
--- a/index.html
+++ b/index.html
@@ -117,10 +117,10 @@
             <p>Click on the tabs to switch between them.</p>
 
             <div id="socialSelection">
-              <input type="radio" id="smInstagram" class="smRadioInput" name="socialmedia" value="instagram" onchange="toggleSocialmedia();" checked>
+              <input type="radio" id="smInstagram" class="smRadioInput" name="socialmedia" value="instagram" onchange="toggleSocialmedia();">
               <label for="smInstagram" class="smRadioLabel">Instagram <i class="ai-instagram-fill"></i></label>
 
-              <input type="radio" id="smInstagram2" class="smRadioInput" name="socialmedia" value="instagram2" onchange="toggleSocialmedia();">
+              <input type="radio" id="smInstagram2" class="smRadioInput" name="socialmedia" value="instagram2" onchange="toggleSocialmedia();" checked>
               <label for="smInstagram2" class="smRadioLabel">Instagram <i class="ai-instagram-fill"></i></label>
 
               <input type="radio" id="smTwitter" class="smRadioInput" name="socialmedia" value="twitter" onchange="toggleSocialmedia();">
@@ -238,6 +238,13 @@
                   <button onclick="window.open('https://escape.michivonah.ch')">Open <i class="ai-link-out"></i></button>
                 </div>
 
+                <div class="project" data-aos="fade-right">
+                  <img src="assets/projects/jassen.png" alt="Jassen by Michi" title="Jassen by Michi">
+                  <h3>Jassen</h3>
+                  <p>I have programmed a Jass game in which you play with three computer opponents. You can set how fast the opponents play and what their names are. The game can be installed on your smartphone or tablet as a PWA.</p>
+                  <button onclick="window.open('https://jass.von-ah.me')">Open <i class="ai-link-out"></i></button>
+                </div>
+
                 <div class="project" data-aos="fade-right">
                   <img src="assets/projects/news-logo.png" alt="News App Logo" title="N3WS App">
                   <h3>N3WS App</h3>
@@ -253,6 +260,13 @@
                   <button onclick="window.open('https://passwords.michivonah.ch')">Open <i class="ai-link-out"></i></button>
                 </div>
 
+                <div class="project" data-aos="fade-left">
+                  <img src="assets/projects/math-tools.png" alt="Math Tools Logo" title="Math Tools">
+                  <h3>Math Tools</h3>
+                  <p>I have created a collection of different math tools. It is not finished yet and not all tools work yet. However, I improve it from time to time.</p>
+                  <button onclick="window.open('https://math-tools.app')">Open <i class="ai-link-out"></i></button>
+                </div>
+
                 <div class="project" data-aos="fade-left">
                   <img src="assets/jump.png" alt="Bitmoji" title="Michi's Blog">
                   <h3>Michi&prime;s Blog</h3>