diff --git a/twentyfortyeight/src/twentyfortyeight/Main.java b/twentyfortyeight/src/twentyfortyeight/Main.java
index 19c4f13..1d765c2 100644
--- a/twentyfortyeight/src/twentyfortyeight/Main.java
+++ b/twentyfortyeight/src/twentyfortyeight/Main.java
@@ -3,18 +3,21 @@ package twentyfortyeight;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Random;
+import javalib.impworld.*;
 import tester.Tester;
 
 // A game of 2048.
-class Game {
+class Game extends World {
     int score;
     Grid grid;
     Random rand;
+    WorldScene scene;
 
-    Game(int score, Grid grid, Random rand) {
+    Game(int score, Grid grid, Random rand, WorldScene scene) {
         this.score = score;
         this.grid = grid;
         this.rand = rand;
+        this.scene = scene;
     }
 
     // Convenience constructor for init with default settings.
@@ -22,6 +25,9 @@ class Game {
         this.grid = new Grid(4, 4);
         this.score = 0;
         this.rand = new Random();
+        this.scene = new WorldScene(
+            this.grid.w, this.grid.h
+        ); // TODO: Add proper scaling parameter.
     }
 
     // Convenience constructor for init with custom settings.
@@ -29,7 +35,10 @@ class Game {
         this.grid = new Grid(w, h);
         this.score = 0;
         this.rand = new Random(seed);
+        this.scene = new WorldScene(this.grid.w, this.grid.h);
     }
+
+    public WorldScene makeScene() { return null; }
 }
 
 // The grid in which the game is played.
@@ -70,6 +79,14 @@ class Grid {
 
     // Get the value at the coords. Just for testing.
     int get(int x, int y) { return this.buf.get(this.w * y + x); }
+
+    // Move all tiles in that direction until they can't move or combine any
+    // more.
+    void move(int d) {
+        // TODO: Don't assume right.
+        // Assume right.
+        for (int i = 0; i < this.h; i++) {}
+    }
 }
 
 class Examples {
@@ -116,4 +133,22 @@ class Examples {
         t.checkExpect(regular.get(0, 0), 0);
         t.checkExpect(regular.get(3, 3), 0);
     }
+
+    void testMoveLeft(Tester t) {
+        init();
+        regular.set(1, 0, 16)
+            .set(2, 0, 16)
+            .set(3, 0, 32)
+            .set(0, 1, 4)
+            .set(1, 1, 4)
+            .set(4, 1, 2);
+
+        // Move right.
+        regular.move(2);
+
+        t.checkExpect(regular.get(2, 0), 32);
+        t.checkExpect(regular.get(3, 0), 32);
+        t.checkExpect(regular.get(2, 1), 8);
+        t.checkExpect(regular.get(3, 1), 2);
+    }
 }