diff --git a/src/sample/InitialParamsWindowController.java b/src/sample/InitialParamsWindowController.java
index 1fbeba4..f9228f9 100644
--- a/src/sample/InitialParamsWindowController.java
+++ b/src/sample/InitialParamsWindowController.java
@@ -1,10 +1,14 @@
 package sample;
 import java.net.URL;
 import java.util.ResourceBundle;
+
+import javafx.event.ActionEvent;
+import javafx.event.EventHandler;
 import javafx.fxml.FXML;
 import javafx.scene.control.Button;
 import javafx.scene.control.Spinner;
 import javafx.scene.control.SpinnerValueFactory;
+import simulation.Simulation;
 
 public class InitialParamsWindowController {
 
@@ -18,10 +22,13 @@ public class InitialParamsWindowController {
     private Spinner<Integer> initialAnimalsSpinner;
 
     @FXML
-    private Spinner<Integer> plantEnergySpinner;
+    private Spinner<Double> initialEnergySpinner;
+
+    @FXML
+    private Spinner<Double> plantEnergySpinner;
 
     @FXML
-    private Spinner<Integer> moveEnergySpinner;
+    private Spinner<Double> moveEnergySpinner;
 
     @FXML
     private Spinner<Double> jungleRatioSpinner;
@@ -35,9 +42,12 @@ public class InitialParamsWindowController {
     @FXML
     private Button startSimulationButton;
 
+
+
     @FXML
     void initialize() {
         assert initialAnimalsSpinner != null : "fx:id=\"initialAnimalsSpinner\" was not injected: check your FXML file 'initialParamsWindow.fxml'.";
+        assert initialEnergySpinner != null : "fx:id=\"initialEnergySpinner\" was not injected: check your FXML file 'initialParamsWindow.fxml'.";
         assert plantEnergySpinner != null : "fx:id=\"plantEnergySpinner\" was not injected: check your FXML file 'initialParamsWindow.fxml'.";
         assert moveEnergySpinner != null : "fx:id=\"moveEnergySpinner\" was not injected: check your FXML file 'initialParamsWindow.fxml'.";
         assert jungleRatioSpinner != null : "fx:id=\"jungleRatioSpinner\" was not injected: check your FXML file 'initialParamsWindow.fxml'.";
@@ -45,11 +55,16 @@ void initialize() {
         assert boardWidthSpinner != null : "fx:id=\"boardWidthSpinner\" was not injected: check your FXML file 'initialParamsWindow.fxml'.";
         assert startSimulationButton != null : "fx:id=\"startSimulationButton\" was not injected: check your FXML file 'initialParamsWindow.fxml'.";
         initialAnimalsSpinner.setValueFactory(new SpinnerValueFactory.IntegerSpinnerValueFactory(0, 25,10));
-        plantEnergySpinner.setValueFactory(new SpinnerValueFactory.IntegerSpinnerValueFactory(0, 100,50));
-        moveEnergySpinner.setValueFactory(new SpinnerValueFactory.IntegerSpinnerValueFactory(0, 100,10));
+        plantEnergySpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0, 100,50));
+        moveEnergySpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0, 100,10));
         jungleRatioSpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0.1, 0.9,0.5,0.01));
         boardHeightSpinner.setValueFactory(new SpinnerValueFactory.IntegerSpinnerValueFactory(10, 100));
         boardWidthSpinner.setValueFactory(new SpinnerValueFactory.IntegerSpinnerValueFactory(10, 100));
+        initialEnergySpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0,100,50));
+    }
+
+    public Button getStartSimulationButton() {
+        return startSimulationButton;
     }
 }
 
diff --git a/src/sample/Main.java b/src/sample/Main.java
index d4e2364..094f585 100644
--- a/src/sample/Main.java
+++ b/src/sample/Main.java
@@ -1,9 +1,11 @@
 package sample;
 
 import javafx.application.Application;
+import javafx.event.ActionEvent;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
 import javafx.scene.Scene;
+import javafx.scene.control.Button;
 import javafx.stage.Stage;
 import simulation.Simulation;
 
@@ -11,11 +13,17 @@ public class Main extends Application {
 
     @Override
     public void start(Stage stage) throws Exception{
-        Parent loader = FXMLLoader.load(getClass().getResource("initialParamsWindow.fxml"));
+        FXMLLoader loader = new FXMLLoader(getClass().getResource("initialParamsWindow.fxml"));
+        Parent root = loader.load();
         stage.setTitle("Evolution Simulator");
-        stage.setScene(new Scene(loader));
+        stage.setScene(new Scene(root));
         stage.setResizable(false);
         stage.show();
+        InitialParamsWindowController controller = loader.getController();
+        Button startButton = controller.getStartSimulationButton();
+        startButton.addEventHandler(ActionEvent.ACTION,e -> {
+
+        });
     }
 
 
diff --git a/src/sample/initialParamsWindow.fxml b/src/sample/initialParamsWindow.fxml
index 9071f9b..a4702d2 100644
--- a/src/sample/initialParamsWindow.fxml
+++ b/src/sample/initialParamsWindow.fxml
@@ -5,7 +5,7 @@
 <?import javafx.scene.control.Spinner?>
 <?import javafx.scene.layout.Pane?>
 
-<Pane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="245.0" prefWidth="261.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.InitialParamsWindowController">
+<Pane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="261.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.InitialParamsWindowController">
    <children>
       <Spinner fx:id="initialAnimalsSpinner" layoutX="162.0" layoutY="80.0" maxWidth="75.0" />
       <Label layoutX="20.0" layoutY="83.0" text="Initial number of animals" />
@@ -13,12 +13,14 @@
       <Label layoutX="20.0" layoutY="113.0" text="Plant energy" />
       <Spinner fx:id="moveEnergySpinner" layoutX="162.0" layoutY="140.0" maxWidth="75.0" />
       <Label layoutX="20.0" layoutY="143.0" text="Move energy" />
-      <Spinner fx:id="jungleRatioSpinner" layoutX="162.0" layoutY="170.0" maxWidth="75.0" />
-      <Label layoutX="20.0" layoutY="173.0" text="Jungle ratio" />
+      <Spinner fx:id="jungleRatioSpinner" layoutX="162.0" layoutY="199.0" maxWidth="75.0" />
+      <Label layoutX="20.0" layoutY="203.0" text="Jungle ratio" />
       <Spinner fx:id="boardHeightSpinner" layoutX="162.0" layoutY="50.0" maxWidth="75.0" />
       <Label layoutX="20.0" layoutY="53.0" text="Board height" />
       <Spinner fx:id="boardWidthSpinner" layoutX="162.0" layoutY="20.0" maxWidth="75.0" />
       <Label layoutX="20.0" layoutY="23.0" text="Board width" />
-      <Button fx:id="startSimulationButton" layoutX="162.0" layoutY="200.0" maxWidth="75.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="75.0" text="Start!" />
+      <Button fx:id="startSimulationButton" layoutX="162.0" layoutY="230.0" maxWidth="75.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="75.0" text="Start!" />
+      <Spinner fx:id="initialEnergySpinner" layoutX="162.0" layoutY="169.0" prefHeight="25.0" prefWidth="75.0" />
+      <Label layoutX="20.0" layoutY="173.0" text="Initial energy" />
    </children>
 </Pane>