Fixed a couple bugs in the desktop code, I think.

audiogame-manager.sh

@@ -115,7 +115,7 @@ fi
 
 # Create desktop launcher file
 desktop_launcher() {
-    local desktopFile="${TMPDIR:-/tmp}/audiogame-manager.desktop"
+    local desktopFile="${HOME}/audiogame-manager.desktop"
     if [[ -e "${desktopFile}" ]]; then
         echo "the file ${desktopFile} exists. Cannot create the launcher."
         exit 1
@@ -139,11 +139,11 @@ desktop_launcher() {
         'StartupNotify=false'
         'Keywords=Games'
         'Version=1.0')
-    echo "${dotDesktop[@]}" > "${desktopFile}"
-    xdg-desktop-icon install "${desktopFile}" 2> /dev/null
-    if [[ -d ~/Desktop ]]; then
-        cp -n "${desktopFile}" ~/Desktop && chmod 755 ~/Desktop/"${desktopFile##*/}"
-    fi
+    for i in "${dotDesktop[@]}" ; do
+        echo "$i" >> "${desktopFile}"
+    done
+    desktop-file-install --dir "${HOME}/.local/share/applications" -m 755 "${desktopFile}"
+    xdg-desktop-icon install ~/.local/share/applications/audiogame-manager.desktop
     rm "${desktopFile}"
     exit 0
 }