dart2wasm CRASH with demo app about sdk HOT 2 CLOSED

diff --git a/lib/src/sokoban_view/components/grided.dart b/lib/src/sokoban_view/components/grided.dart
index 198775a..e28a176 100644
--- a/lib/src/sokoban_view/components/grided.dart
+++ b/lib/src/sokoban_view/components/grided.dart
@@ -25,6 +25,6 @@ mixin GridElement {
   Vector2 getPosition() => Vector2(
       (gridPosition.x * gridPixelDimensions.x) + gridPixelOffset.x,
       (gridPosition.y * gridPixelDimensions.y) + gridPixelOffset.y);
-  double getGridValue() => (gridPosition.y * 13.0) + gridPosition.x;
-  int getLayeredGridValue() => getGridValue().toInt() + (layer * 200);
+  int getGridValue() => ((gridPosition.y * 13.0) + gridPosition.x).toInt();
+  int getLayeredGridValue() => getGridValue() + (layer * 200);
 }
diff --git a/lib/src/sokoban_view/components/world.dart b/lib/src/sokoban_view/components/world.dart
index c68e5a8..c2460f3 100644
--- a/lib/src/sokoban_view/components/world.dart
+++ b/lib/src/sokoban_view/components/world.dart
@@ -158,7 +158,7 @@ class SokobanWorld extends World with HasGameRef {
       var initialIdx = int.parse(split[1]);
       var nextIdx = int.parse(split[2]);
       var goalHit = bool.parse(split[3]);
-      var gridValue = box.getGridValue() as int;
+      var gridValue = box.getGridValue();
 
       logger.i('box $idx $gridValue');
       if (gridValue == initialIdx) {
@@ -183,7 +183,7 @@ class SokobanWorld extends World with HasGameRef {
 
     for (var idx = 0; idx < batteries.length; idx++) {
       var battery = batteries[idx];
-      var gridValue = battery.getGridValue() as int;
+      var gridValue = battery.getGridValue();
 
       if (gridValue == initialIdx) {
         battery.hide();