diff --git a/src/main/java/JumpGame.java b/src/main/java/JumpGame.java
index c711359..608970f 100644
--- a/src/main/java/JumpGame.java
+++ b/src/main/java/JumpGame.java
@@ -12,15 +12,8 @@
 public class JumpGame {
     //---------------------------------------------------------------
 //    private Time time = new Time();
-//    private Position position = new Position(ground);
 //    private Gameover gameover = new Gameover(position);
-//    private Onground onground = new Onground(ground, position);
-//    private Velocity velocity = new Velocity(position, onground);
 //    private Clear clear = new Clear(position);
-//    private Move move = new Move(velocity);
-//    private Acceleration acceleration = new Acceleration(velocity, onground);
-//    private Force force = new Force(acceleration);
-//    private Mass mass = new Mass(acceleration);
 
     //---------------------------------------------------------------
     // new
@@ -44,7 +37,9 @@
 
         // model
         models.add(new GroundModel());
-        models.add(new PlayerModel(models.get(ModelType.GroundModel)));
+
+        GroundModel groundModel = (GroundModel) models.get(ModelType.GroundModel);
+        models.add(new PlayerModel(groundModel.getGround()));
 
         // view
         views.add(new TileRenderer("resources/tile.png", 1));
@@ -76,6 +71,5 @@
     }
 
     //---------------------------------------------------------------
-    //---------------------------------------------------------------
 
 }
\ No newline at end of file
diff --git a/src/main/java/models/PlayerModel.java b/src/main/java/models/PlayerModel.java
index 3b530a0..e992429 100644
--- a/src/main/java/models/PlayerModel.java
+++ b/src/main/java/models/PlayerModel.java
@@ -19,11 +19,10 @@
 
     //---------------------------------------------------------------
     //
-    public PlayerModel(IModel model) {
-        GroundModel groundModel = (GroundModel)model;
+    public PlayerModel(Ground ground) {
 
-        position = new Position(new Pair<>(640d, 480d), groundModel.getGround());
-        onground = new Onground(groundModel.getGround(), position);
+        position = new Position(new Pair<>(640d, 480d), ground);
+        onground = new Onground(ground, position);
         velocity = new Velocity(position, onground);
         acceleration = new Acceleration(velocity, onground);
         force = new Force(acceleration);
diff --git a/src/main/java/views/TileMapRenderer.java b/src/main/java/views/TileMapRenderer.java
new file mode 100644
index 0000000..478c182
--- /dev/null
+++ b/src/main/java/views/TileMapRenderer.java
@@ -0,0 +1,4 @@
+package views;
+
+public class TileMapRenderer {
+}