Improve select image layout

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.9
-app.versionCode=9
+app.versionName=0.0.10
+app.versionCode=10

lib/screens/home.dart

@@ -12,7 +12,6 @@ import '../utils/get_images_list.dart';
 class Home extends StatelessWidget {
   static const String id = 'home';
 
-  double _selectorImageSize = 200;
   double _tipImageSize = 100;
   double _tileImageSize = 80;
 
@@ -30,6 +29,7 @@ class Home extends StatelessWidget {
     await getImagesList.init();
     if (getImagesList.images != null) {
       myProvider.updateImages = getImagesList.images;
+      shuffleImages(myProvider);
     }
   }
 
@@ -40,7 +40,13 @@ class Home extends StatelessWidget {
     myProvider.updateShuffling = false;
   }
 
-  Container _buildImageSelectorItem(Data myProvider, String image) {
+  void shuffleImages(Data myProvider) {
+    List images = myProvider.images;
+    images.shuffle();
+    myProvider.updateImages = images;
+  }
+
+  Container _buildImageSelectorItem(Data myProvider, String image, double size) {
     return Container(
       child: FlatButton(
         child: Container(
@@ -54,8 +60,8 @@ class Home extends StatelessWidget {
           margin: EdgeInsets.all(2),
           child: Image(
             image: AssetImage(getImageAssetName(image)),
-            width: _selectorImageSize,
-            height: _selectorImageSize,
+            width: size,
+            height: size,
             fit: BoxFit.fill
           ),
         ),
@@ -64,7 +70,7 @@ class Home extends StatelessWidget {
     );
   }
 
-  Container _buildImageSelector(Data myProvider) {
+  Container _buildImageSelector(Data myProvider, double size) {
     if (myProvider.images.length == 0) {
       getImagesList(myProvider);
     }
@@ -74,8 +80,27 @@ class Home extends StatelessWidget {
       padding: EdgeInsets.all(5),
       child: ListView(
         children: [
-          for (var image in images)
-            _buildImageSelectorItem(myProvider, image),
+          Table(
+            defaultColumnWidth: IntrinsicColumnWidth(),
+            children: [
+              for (var imageIndex = 0; imageIndex < images.length; imageIndex+=2)
+                TableRow(
+                  children: [
+                    Column(
+                      children: [
+                        _buildImageSelectorItem(myProvider, images[imageIndex], size)
+                      ]
+                    ),
+                    Column(
+                      children: [
+                        if (imageIndex+1 < images.length)
+                          _buildImageSelectorItem(myProvider, images[imageIndex+1], size)
+                      ]
+                    ),
+                  ]
+                ),
+            ],
+          ),
         ],
       ),
     );
@@ -253,29 +278,37 @@ class Home extends StatelessWidget {
 
     var content;
 
+    double _selectorImageSize = MediaQuery.of(context).size.width / 3;
+
     if (_myProvider.shuffling) {
       content = _buildShufflingIndicatorWidget();
     } else {
       if (_myProvider.image == '') {
-        content = _buildImageSelector(_myProvider);
+        content = _buildImageSelector(_myProvider, _selectorImageSize);
       } else {
         content = _buildGameWidget(_myProvider);
       }
     }
 
+    List<Widget> menuActions = [
+      IconButton(
+        icon: const Icon(Icons.shuffle),
+        onPressed: () => shuffleImages(_myProvider),
+      ),
+      _buildTilesetSizeSelector(_myProvider),
+    ];
+
+    List<Widget> gameActions = [
+      IconButton(
+        icon: const Icon(Icons.arrow_left_outlined),
+        onPressed: () => resetGame(_myProvider),
+      )
+    ];
+
     return Scaffold(
       appBar: AppBar(
         title: Text('Puzzle'),
-        actions: <Widget>[
-          _myProvider.image == ''
-          ? Text('')
-          : IconButton(
-              icon: const Icon(Icons.arrow_left_outlined),
-              onPressed: () => resetGame(_myProvider),
-            )
-          ,
-          _myProvider.image == '' ? _buildTilesetSizeSelector(_myProvider) : Text(''),
-        ],
+        actions: _myProvider.image == '' ? menuActions : gameActions,
       ),
       body: SafeArea(
         child: Center(