diff --git a/lib/MovingObject.dart b/lib/MovingObject.dart
index 0be3593..77c49ea 100644
--- a/lib/MovingObject.dart
+++ b/lib/MovingObject.dart
@@ -34,8 +34,26 @@ class MovingObject extends Component {
     sprite.position = sprite.position - Vector2(velocity * dt, 0);
   }
 
-  @override
-  void remove() {
-    super.remove();
+  String intersect(Rect other) {
+    final collision = sprite.toRect().intersect(other);
+    if (!collision.isEmpty) {
+      // print(collision);
+      double ydistance = other.top - sprite.toRect().top;
+      double xdistance = other.left - sprite.toRect().left;
+      if (ydistance.abs() > xdistance.abs()) {
+        if (ydistance > 0) {
+          return "bottom";
+        } else {
+          return "top";
+        }
+      } else {
+        if (xdistance > 0) {
+          return "right";
+        } else {
+          return "left";
+        }
+      }
+    }
+    return "none";
   }
 }
diff --git a/lib/PlatformLoader.dart b/lib/PlatformLoader.dart
index 0adc630..76aeb69 100644
--- a/lib/PlatformLoader.dart
+++ b/lib/PlatformLoader.dart
@@ -44,7 +44,6 @@ class PlatformHolder {
       Platform platform = Platform(gameRef);
       platform.setPosition(xCordinate, gameRef.blockSize * level);
       platforms[level].add(platform);
-      print(platforms[0].length);
       return false;
     }
   }
@@ -78,7 +77,7 @@ class PlatformHolder {
           platformLevel.length > 3 &&
           random.nextInt(100) > 65 &&
           removed > 0) {
-        int secondToLast = platformLevel.length - 3;
+        int secondToLast = platformLevel.length - 4;
         double secondToLastPosition =
             platformLevel.elementAt(secondToLast).sprite.x;
         if (secondToLastPosition > gameRef.size.x) {
diff --git a/lib/Runner.dart b/lib/Runner.dart
index ed897cf..ba9d85c 100644
--- a/lib/Runner.dart
+++ b/lib/Runner.dart
@@ -1,6 +1,7 @@
 import 'package:firo_runner/main.dart';
 import 'package:flame/effects.dart';
 import 'package:flutter/material.dart';
+import 'Platform.dart';
 
 import 'package:flame/components.dart';
 
@@ -17,13 +18,13 @@ enum RunnerState {
 
 class Runner extends Component with HasGameRef<MyGame> {
   late SpriteAnimationGroupComponent sprite;
+  String runnerState = "run";
 
   void setPosition(Vector2 position) {
     sprite.position = position;
   }
 
   void setSize(Vector2 size, double ySize) {
-    // runnerSize = size;
     sprite.size = size;
   }
 
@@ -37,15 +38,16 @@ class Runner extends Component with HasGameRef<MyGame> {
     getSprite().render(c, position: sprite.position, size: sprite.size);
   }
 
-  int level = 7;
+  int level = 1;
 
   void updateLevel() {
     level = (sprite.position.y / gameRef.blockSize).round();
   }
 
-  String runnerState = "run";
+  String previousState = "run";
 
   void event(String event) {
+    previousState = runnerState;
     print(event);
     switch (event) {
       case "jump":
@@ -60,17 +62,20 @@ class Runner extends Component with HasGameRef<MyGame> {
           curve: Curves.bounceIn,
           onComplete: () {
             updateLevel();
-            runnerState = "run";
+            this.event("float");
           },
         ));
         break;
       case "doublejump":
+        if (level - 1 < 0) {
+          break;
+        }
         runnerState = event;
         sprite.current = RunnerState.jump;
         sprite.addEffect(MoveEffect(
           path: [
             sprite.position,
-            Vector2(sprite.x, (level - 3) * gameRef.blockSize),
+            Vector2(sprite.x, (level - 2) * gameRef.blockSize),
           ],
           speed: 50,
           curve: Curves.ease,
@@ -83,15 +88,21 @@ class Runner extends Component with HasGameRef<MyGame> {
       case "fall":
         runnerState = event;
         sprite.current = RunnerState.fall;
-        // TODO calculate distance to next platform.
         sprite.addEffect(MoveEffect(
           path: [
-            // sprite.position,
             Vector2(sprite.x, (level + 1) * gameRef.blockSize),
           ],
-          speed: 50,
+          speed: 100,
           curve: Curves.ease,
-          onComplete: updateLevel,
+          onComplete: () {
+            if (runnerState == "fall") {
+              updateLevel();
+              sprite.position = Vector2(sprite.x, level * gameRef.blockSize);
+              this.event("run");
+            } else {
+              this.event("float");
+            }
+          },
         ));
         break;
       case "kick":
@@ -106,10 +117,7 @@ class Runner extends Component with HasGameRef<MyGame> {
         runnerState = event;
         sprite.current = RunnerState.float;
         sprite.addEffect(MoveEffect(
-          path: [
-            sprite.position,
-            Vector2(sprite.x, (level - 1) * gameRef.blockSize),
-          ],
+          path: [sprite.position],
           speed: 50,
           curve: Curves.ease,
           onComplete: () {
@@ -137,13 +145,12 @@ class Runner extends Component with HasGameRef<MyGame> {
   }
 
   void control(String input) {
-    print(runnerState + " " + input);
-    print(sprite.position);
+    print(input);
     switch (input) {
       case "up":
         if (runnerState == "run") {
           event("jump");
-        } else if (runnerState == "jump") {
+        } else if (runnerState == "float" && previousState == "jump") {
           event("doublejump");
         } else if (runnerState == "duck") {
           event("run");
@@ -152,6 +159,8 @@ class Runner extends Component with HasGameRef<MyGame> {
       case "down":
         if (runnerState == "run") {
           event("duck");
+        } else if (runnerState == "float" && onTopOfPlatform()) {
+          event("run");
         } else if (runnerState == "float") {
           event("fall");
         }
@@ -162,7 +171,8 @@ class Runner extends Component with HasGameRef<MyGame> {
         }
         break;
       case "center":
-        if (runnerState == "jump") {
+        if (runnerState == "fall") {
+          updateLevel();
           event("float");
         }
         break;
@@ -181,9 +191,55 @@ class Runner extends Component with HasGameRef<MyGame> {
       sprite.current = RunnerState.run;
     }
 
+    intersecting();
     sprite.update(dt);
   }
 
+  bool onTopOfPlatform() {
+    Rect runnerRect = sprite.toRect();
+    bool onTopOfPlatform = false;
+    for (List<Platform> platformLevel in gameRef.platformHolder.platforms) {
+      for (Platform p in platformLevel) {
+        String side = p.intersect(runnerRect);
+        if (side == "none") {
+          Rect belowRunner = Rect.fromLTRB(runnerRect.left, runnerRect.top,
+              runnerRect.right, runnerRect.bottom + 1);
+          if (p.intersect(belowRunner) != "none") {
+            onTopOfPlatform = true;
+          }
+        }
+      }
+    }
+    return onTopOfPlatform;
+  }
+
+  void intersecting() {
+    Rect runnerRect = sprite.toRect();
+    bool onTopOfPlatform = false;
+    for (List<Platform> platformLevel in gameRef.platformHolder.platforms) {
+      for (Platform p in platformLevel) {
+        String side = p.intersect(runnerRect);
+        if (side == "none") {
+          Rect belowRunner = Rect.fromLTRB(runnerRect.left, runnerRect.top,
+              runnerRect.right, runnerRect.bottom + 1);
+          if (p.intersect(belowRunner) != "none") {
+            onTopOfPlatform = true;
+          }
+        } else if (side == "bottom") {
+          // The runner has hit his head on the ceiling and should die.
+          event("die");
+        }
+      }
+    }
+
+    if (!onTopOfPlatform &&
+        (runnerState == "run" ||
+            runnerState == "kick" ||
+            runnerState == "duck")) {
+      event("fall");
+    }
+  }
+
   Future load(loadSpriteAnimation) async {
     SpriteAnimation running = await loadSpriteAnimation(
       'run-frames.png',
diff --git a/lib/main.dart b/lib/main.dart
index b94326a..0182602 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -59,11 +59,9 @@ class MyGame extends BaseGame with PanDetector, TapDetector, KeyboardEvents {
   @override
   Future<void> onLoad() async {
     debugMode = true;
-    print("load");
     FlameAudio.bgm.initialize();
     background = await Flame.images.load('bg.png');
     background1 = Sprite(background);
-    print(background.height.toString() + " " + background.width.toString());
     background2 = Sprite(background);
     platform1 = await Flame.images.load('platform1.png');
     platform2 = await Flame.images.load('platform2.png');
@@ -81,7 +79,7 @@ class MyGame extends BaseGame with PanDetector, TapDetector, KeyboardEvents {
     runner = Runner();
     await runner.load(loadSpriteAnimation);
     runner.setSize(runnerSize, blockSize);
-    runnerPosition = Vector2(blockSize, blockSize * 7);
+    runnerPosition = Vector2(blockSize, blockSize * 1);
     runner.setPosition(runnerPosition);
     add(runner);
 
@@ -126,14 +124,12 @@ class MyGame extends BaseGame with PanDetector, TapDetector, KeyboardEvents {
     super.update(dt);
     gameState.update(dt);
     platformHolder.update(dt);
-    // print(gameState.distance);
   }
 
   @override
   void onResize(Vector2 size) {
     super.onResize(size);
     blockSize = size.y / 9;
-    print(blockSize);
     runnerSize = Vector2(
       size.y / 9,
       size.y / 9,