diff --git a/src/main/java/entities/ModelType.java b/src/main/java/entities/ModelType.java
deleted file mode 100644
index 193b2e6..0000000
--- a/src/main/java/entities/ModelType.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package entities;
-
-//---------------------------------------------------------------
-// モデルのタイプ識別
-public class ModelType {
-
-    public static final int GROUND_MODEL = 0;
-    public static final int PLAYER_MODEL = 1;
-    public static final int GAME_MODEL = 2;
-
-    //---------------------------------------------------------------
-    //---------------------------------------------------------------
-    private ModelType() {
-
-    }
-    //---------------------------------------------------------------
-}
diff --git a/src/main/java/models/JumpGameModel.java b/src/main/java/models/JumpGameModel.java
index 73d975e..b0617aa 100644
--- a/src/main/java/models/JumpGameModel.java
+++ b/src/main/java/models/JumpGameModel.java
@@ -68,6 +68,7 @@
     //---------------------------------------------------------------
     //
     public void updateGravity(double gravity) {
+        this.time.gravity(gravity);
         this.force.gravity(gravity);
         System.out.println("swapWindow Gravity");
     }
diff --git a/src/main/java/views/TileMapRenderer.java b/src/main/java/views/TileMapRenderer.java
index 05d9fb6..71aff43 100644
--- a/src/main/java/views/TileMapRenderer.java
+++ b/src/main/java/views/TileMapRenderer.java
@@ -14,7 +14,7 @@
     private double offsetY = 256d;
     private TileRenderer newTile = new TileRenderer("resources/tile.png", null, 2);
     private ArrayList<TileRenderer> tiles = new ArrayList<>();
-    private int tileLen = 150;
+    private int tileLen = 150; //
 
     //---------------------------------------------------------------
     //---------------------------------------------------------------
@@ -44,6 +44,21 @@
         for (TileRenderer tile : tiles) tile.delete();
     }
 
+
+    //--------------------------------------------------------------
+    //---------------------------------------------------------------
+    // 初期タイル作成
+    private void initTiles() {
+
+        for (int i = 0; i < tileLen; i++) {
+            double x = 32 * newTile.getScaleValue() * i;
+
+            newTile = new TileRenderer("resources/tile.png", new Pair<>(x, offsetY));
+            newTile.setScaleValue(2);
+            tiles.add(newTile);
+        }
+    }
+
     //--------------------------------------------------------------
     // タイルをフラグに応じて生成する
     private void createTile(TileType tileType) {
@@ -62,13 +77,4 @@
     }
 
     //---------------------------------------------------------------
-    // 初期タイル作成
-    private void initTiles() {
-        for (double x = 0; x <= GLConfigVariable.WIDTH; x += 32 * newTile.getScaleValue()) {
-            newTile = new TileRenderer("resources/tile.png", new Pair<>(x, offsetY));
-            newTile.setScaleValue(2);
-            tiles.add(newTile);
-        }
-    }
-    //---------------------------------------------------------------
 }
\ No newline at end of file