Try removing map for smartphones. Can remove image.

index.html

@@ -20,8 +20,10 @@
 <!-- Navbar -->
 <nav class="navbar navbar-expand-md navbar-dark bg-success fixed-top">
     <a class="navbar-brand" href="index.html">Jovian Hersemeule</a>
-    <img class="rounded-circle jovian-toggler" type="button" data-toggle="collapse" data-target="#joviaNav" aria-controls="joviaNav"
-          aria-expanded="false" aria-label="Dérouler le menu" src="https://img.icons8.com/color/48/000000/menu-2.png" alt="V">
+    <img class="rounded-circle jovian-toggler" type="button" data-toggle="collapse" data-target="#joviaNav"
+         aria-controls="joviaNav"
+         aria-expanded="false" aria-label="Dérouler le menu" src="https://img.icons8.com/color/48/000000/menu-2.png"
+         alt="V">
     <div class="collapse navbar-collapse" id="joviaNav">
         <ul class="navbar-nav mr-auto">
             <li class="nav-item active">
@@ -79,7 +81,8 @@
         <p class="lead">Vous trouverez ici les principales informations me concernant : qui je suis, mon parcours, mon
             expérience professionnelle et mes projets de programmation.<br>Bonne visite !</p>
     </div>
-    <img class="rounded img-fluid mx-auto d-block" src="images/home_picture_v1.jpg" alt="Photo d'accueil" usemap="#homemap">
+    <img class="rounded img-fluid mx-auto d-block d-none d-sm-block" src="images/home_picture_v1.jpg"
+         alt="Photo d'accueil" usemap="#homemap">
 
     <!-- Map image parts to site naviagtion -->
     <map name="homemap">