diff --git a/library.json b/library.json
index caabf32..a16a0dd 100644
--- a/library.json
+++ b/library.json
@@ -8,6 +8,7 @@
   "author": "Joubel",
   "license": "MIT",
   "machineName": "H5P.MemoryGame",
+  "embedTypes": ["iframe"],
   "preloadedCss": [
     {
       "path": "memory-game.css"
@@ -54,4 +55,4 @@
       "minorVersion": 3
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/memory-game.css b/memory-game.css
index 199a07b..5808ffb 100644
--- a/memory-game.css
+++ b/memory-game.css
@@ -276,6 +276,7 @@
   transform: translate(-50%,-50%) scale(1) rotate(0);
   cursor: pointer;
   line-height: 1.2;
+  white-space: nowrap;
   padding: 0.5em 1.25em;
   border-radius: 2em;
   background: #1a73d9;