diff --git a/src/main/java/edu/ntnu/stud/chaosgame/controller/game/GuiButtonController.java b/src/main/java/edu/ntnu/stud/chaosgame/controller/game/GuiButtonController.java
index bee579520d85416b4d9da7253dd2bfab2a3efa03..f0b78e1b717e7bc4f9c6ad6fc0895536077ac803 100644
--- a/src/main/java/edu/ntnu/stud/chaosgame/controller/game/GuiButtonController.java
+++ b/src/main/java/edu/ntnu/stud/chaosgame/controller/game/GuiButtonController.java
@@ -298,6 +298,7 @@ public class GuiButtonController {
    */
   public void startGame() {
     timeline.play();
+    gui.getStartButton().setText("Start");
   }
 
   /**
@@ -305,6 +306,7 @@ public class GuiButtonController {
    */
   public void stopGame() {
     timeline.stop();
+    gui.getStartButton().setText("Resume");
   }
 
   /**
@@ -380,6 +382,4 @@ public class GuiButtonController {
     game = new ChaosGame(description, chaosCanvas);
     game.setUseColor(gui.getColorCheckBox().isSelected());
   }
-
-
 }
\ No newline at end of file
diff --git a/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/ChaosGameFileHandler.java b/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/ChaosGameFileHandler.java
index d39db5ca87d65e9c6a9f675d7ecd58c92043815a..e48f77999d284514127f025ec033c57a8ef3b0b8 100644
--- a/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/ChaosGameFileHandler.java
+++ b/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/ChaosGameFileHandler.java
@@ -46,7 +46,7 @@ public class ChaosGameFileHandler {
       name = scanner.next().trim();
 
 
-      if (firstLine.equals("Affine2D") && !Formatter.canConvertToFloat(name)) {
+      if (firstLine.equals("Affine2D") && Formatter.canConvertToFloat(name)) {
         // Read the minimum vector
         if (scanner.hasNextDouble()) {
           double x0min = scanner.nextDouble();
@@ -80,7 +80,7 @@ public class ChaosGameFileHandler {
           Transform2D transform2D = new AffineTransform2D(matrix2x2, vector2D);
           transforms.add(transform2D);
 
-        }} else if(firstLine.equals("Julia") && !Formatter.canConvertToFloat(name)){
+        }} else if(firstLine.equals("Julia") && Formatter.canConvertToFloat(name)){
         // Read the minimum vector
         if (scanner.hasNextDouble()) {
           double x0min = scanner.nextDouble();
diff --git a/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/Formatter.java b/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/Formatter.java
index 2f6f776b519b209af5d4418c19dea3980d636809..89aa26817e72508f53ab66d639716ef07c056eac 100644
--- a/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/Formatter.java
+++ b/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/Formatter.java
@@ -79,6 +79,6 @@ public class Formatter {
       canConvert = true;
     } catch (NumberFormatException ignored) {
     }
-    return canConvert;
+    return !canConvert;
   }
   }
diff --git a/src/main/java/edu/ntnu/stud/chaosgame/controller/PopupManager.java b/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/PopupManager.java
similarity index 90%
rename from src/main/java/edu/ntnu/stud/chaosgame/controller/PopupManager.java
rename to src/main/java/edu/ntnu/stud/chaosgame/controller/utility/PopupManager.java
index 5cec0d70fb9bdae39e0a65d2c60a3ff15e90b09c..67852062d7c91d14a46273ab62ceb0de4a4bbdd0 100644
--- a/src/main/java/edu/ntnu/stud/chaosgame/controller/PopupManager.java
+++ b/src/main/java/edu/ntnu/stud/chaosgame/controller/utility/PopupManager.java
@@ -1,4 +1,4 @@
-package edu.ntnu.stud.chaosgame.controller;
+package edu.ntnu.stud.chaosgame.controller.utility;
 
 import javafx.scene.control.Alert;
 import javafx.scene.control.Alert.AlertType;
diff --git a/src/main/java/edu/ntnu/stud/chaosgame/view/ChaosGameImageView.java b/src/main/java/edu/ntnu/stud/chaosgame/view/ChaosGameImageView.java
index e956a4f580081ca591abdba502bf203d5e644846..bdc3d284e2885ab6f236a98555a533f86f15d805 100644
--- a/src/main/java/edu/ntnu/stud/chaosgame/view/ChaosGameImageView.java
+++ b/src/main/java/edu/ntnu/stud/chaosgame/view/ChaosGameImageView.java
@@ -1,6 +1,6 @@
 package edu.ntnu.stud.chaosgame.view;
 
-import edu.ntnu.stud.chaosgame.controller.PopupManager;
+import edu.ntnu.stud.chaosgame.controller.utility.PopupManager;
 import javafx.scene.image.ImageView;
 import javafx.scene.input.ScrollEvent;
 import javafx.scene.transform.Affine;
@@ -21,13 +21,14 @@ public class ChaosGameImageView extends ImageView {
    */
   private final Affine transform = new Affine();
 
-  private double centreX;
-  private double centreY;
-
   /**
-   * The starting x and y positions upon a mouse event.
+   * The starting position of the mouse cursor when dragging.
    */
   private double startX;
+
+  /**
+   * The starting position of the mouse cursor when dragging.
+   */
   private double startY;
 
   /**
@@ -74,7 +75,7 @@ public class ChaosGameImageView extends ImageView {
    * @param event the event.
    */
   private synchronized void userZoom(ScrollEvent event) {
-    double newZoomFactor = event.getDeltaY() > 0 ? 1.10 : 1 / 1.05;
+    double newZoomFactor = event.getDeltaY() > 0 ? 1.05 : 1 / 1.05;
     try {
       // Get the old values
       double oldScaleX = transform.getMxx();
@@ -103,38 +104,6 @@ public class ChaosGameImageView extends ImageView {
     }
   }
 
-  public void fixedZoom(double newZoomFactor) {
-    try {
-      // Get the old values
-      double oldScaleX = transform.getMxx();
-      double oldScaleY = transform.getMyy();
-      double oldTranslateX = transform.getTx();
-      double oldTranslateY = transform.getTy();
-
-      // Compute the new values
-      double newScaleX = oldScaleX * newZoomFactor;
-      double newScaleY = oldScaleY * newZoomFactor;
-      double newTranslateX = oldTranslateX - (this.getWidth() / 2 * (newScaleX - oldScaleX));
-      double newTranslateY = oldTranslateY - (this.getHeight() / 2 * (newScaleY - oldScaleY));
-
-      // Update the transform
-      transform.setMxx(newScaleX);
-      transform.setMyy(newScaleY);
-      transform.setTx(newTranslateX);
-      transform.setTy(newTranslateY);
-
-      this.zoomFactor *= newZoomFactor;
-      this.zoomLevel = (int) (Math.log(this.zoomFactor) / Math.log(4)); // Update zoom level.
-
-    } catch (Exception e) {
-      PopupManager.displayError("Zoom error", e.getMessage());
-    }
-  }
-// TODO: remove if unused
-  private void updateController() {
-    this.controller.updateDetail(this.zoomLevel, this.centreX, this.centreY);
-  }
-
   /**
    * Gets mouse cursor position data when mouse button is pressed.
    *