diff --git a/src/activities/erase/Block.qml b/src/activities/erase/Block.qml
--- a/src/activities/erase/Block.qml
+++ b/src/activities/erase/Block.qml
@@ -34,9 +34,9 @@
     property int nby
 
     x: ix * main.width / nbx
-    y: iy * (main.height - bar.height / 2) / nby
+    y: iy * (main.height - bar.height) / (nby + 0.125 * ApplicationInfo.ratio)
     width: main.width / nbx
-    height: (main.height - bar.height / 2) / nby
+    height: (main.height - bar.height) / (nby + 0.125 * ApplicationInfo.ratio)
 
     signal enter
     signal leave
diff --git a/src/activities/erase/erase.js b/src/activities/erase/erase.js
--- a/src/activities/erase/erase.js
+++ b/src/activities/erase/erase.js
@@ -22,6 +22,7 @@
 
 .pragma library
 .import QtQuick 2.6 as Quick
+.import GCompris 1.0 as GCompris //for ApplicationInfo
 .import "qrc:/gcompris/src/core/core.js" as Core
 
 var url = "qrc:/gcompris/src/activities/erase/resource/"
@@ -128,8 +129,8 @@
     }
     createdBlocks = 0
     killedBlocks = 0
-    var nbx = (currentLevel % 2 * 3) + 5;
-    var nby = (currentLevel % 2 * 3) + 5;
+    var nbx = Math.min((currentLevel % 2 * 3) + 5, main.width / (10 * GCompris.ApplicationInfo.ratio));
+    var nby = Math.min((currentLevel % 2 * 3) + 5, main.height / (10 * GCompris.ApplicationInfo.ratio));
     var w = main.width / nbx
     var h = (main.height - items.bar.height) / nby
     var i = 0