diff -r 9dacd7d46405 -r 4eb79fa3434a minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java
--- a/minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java	Sat Feb 08 06:36:06 2014 +0100
+++ b/minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java	Sat Feb 08 09:25:53 2014 +0100
@@ -55,14 +55,14 @@
     })
     static class SquareModel {
         @ComputedProperty static String html(SquareType state) {
-            if (state == null) return " ";
+            if (state == null) return " ";
             switch (state) {
-                case EXPLOSION: return "B";
-                case UNKNOWN: return "?";
+                case EXPLOSION: return "✗";
+                case UNKNOWN: return " ";
                 case DISCOVERED: return "✔";  
                 case N_0: return " ";
             }
-            return "" + state.ordinal();
+            return "&#x278" + (state.ordinal() - 1);
         }
         
         @ComputedProperty static String style(SquareType state) {