diff --git a/main.js b/main.js
index 38b7d8f..9f0ea70 100644
--- a/main.js
+++ b/main.js
@@ -1,6 +1,6 @@
-// Settings. If you change the tilesize (256px) you also have to change it in
-// the CSS.
-const numRocks = 500;
+// Settings. If you change the tilesize (256px) or the gridSize (25600px) you
+// also have to change those values in the CSS.
+const numRocks = 600;
 const gridSize = 25600 / 256;
 const bugDanceDuration = 2000;
 const bugAgitateDuration = 1000;
diff --git a/style.css b/style.css
index 5275c6e..91f239c 100644
--- a/style.css
+++ b/style.css
@@ -108,8 +108,8 @@ body {
 }
 
 #scrollable-area {
-  width: 51200px;
-  height: 51200px;
+  width: 25600px;
+  height: 25600px;
   background-image: url("./assets/img/forest-tile-512x512.jpg");
   background-repeat: repeat;
   display: grid;