Add new retro theme & fix touch input problem

style.css

@@ -212,11 +212,29 @@ body {
 
 #score {
     font-weight: 900;
-    bottom: 0;
+    bottom: initial;
     top: 2.5vh;
     font-size: 5vh;
 }
 
+#score.update {
+    animation: scoreUpdate .5s;
+}
+
+@keyframes scoreUpdate {
+    0% {
+        transform: translateX(-50%) scale(1);
+    }
+
+    50% {
+        transform: translateX(-50%) scale(1.5);
+    }
+
+    100% {
+        transform: translateX(-50%) scale(1);
+    }
+}
+
 #time:before, #score:before {
     content: attr(data-prefix);
 }
@@ -230,6 +248,10 @@ body {
     max-width: 20vw;
 }
 
+.game-over #score {
+    top: 50%;
+}
+
 #footer {
     position: absolute;
     bottom: 10px;