diff --git a/README.md b/README.md
index ddb4579..2c56687 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,15 @@
 ### **7not7**
 ### *A 7x7 clone written in java*
 
+This page should be viewed on [Github](https://github.com/id101010/7not7)
+
 ---
 
 ### Summary
 
 7x7 is a concentration game which challenges you to connect 4 or more blocks of the same color on the game field.
 To make things harder each round n blocks of random colors get thrown upon the field and the number n increases with each level.
-You can choose the field size to be eighter 7x7, 8x8, 9x9 or 10x10.
+You can choose the field size to be either 7x7, 8x8, 9x9 or 10x10.
 
 ![Moving Blocks](https://github.com/id101010/7not7/blob/master/doc/movingBlocks.png)
 
@@ -15,6 +17,7 @@ You can choose the field size to be eighter 7x7, 8x8, 9x9 or 10x10.
 
 The goal is to clear as much lines as possible by stacking blocks of the same color in any direction.
 So you can eighter build up blocks vertically, horizontally or diagonal.
+To move blocks click on the block you want to move, hold the mouse and release it on the target position.
 
 ### Tools and how to get them
 
diff --git a/src/ch/bfh/sevennotseven/FieldCanvas.java b/src/ch/bfh/sevennotseven/FieldCanvas.java
index 684b339..b1de3fc 100644
--- a/src/ch/bfh/sevennotseven/FieldCanvas.java
+++ b/src/ch/bfh/sevennotseven/FieldCanvas.java
@@ -24,6 +24,7 @@ public class FieldCanvas extends JPanel{
 	static final int borderTop = 5;
 	static final int borderBottom = 5;
 	
+	//Colors to use to paint the blocks. Chosen with a color scheme designer
 	public static final Color[] colors = { 
 			new Color(0xD66436),
 			new Color(0x486F70),
@@ -34,11 +35,11 @@ public class FieldCanvas extends JPanel{
 	
 	
 	private Game game;
-	private Point src;
-	private Point dst;
-	private List<Point> path;
-	private List<Point> blockedFields;
-	private boolean freeMoveMode = false;
+	private Point src; //Position of the Block that the user wants to move (can be null)
+	private Point dst; //Destination Position (can be null)
+	private List<Point> path; //Path that visualizes src->dst (can be null)
+	private List<Point> blockedFields; //Fields that should be marked as blocked (can be null)
+	private boolean freeMoveMode = false; //Whether or not we're in free moving mode
 	
 	/**
 	 * Constructor of FieldCanvas
@@ -53,9 +54,9 @@ public class FieldCanvas extends JPanel{
 				super.mousePressed(e);
 				
 				Point p = FieldCanvas.this.getClickPoint(e.getPoint());
-				if(p==null || game.getField()[p.x][p.y]==0) { //invalid click
+				if(p==null || game.getField()[p.x][p.y]==0) { //invalid click (outside of bounds or on empty position)
 					src = null;
-				} else {
+				} else { //valid click
 					src = p;
 					if(freeMoveMode) {
 						blockedFields = game.getReachablePoints(src);
@@ -69,24 +70,26 @@ public class FieldCanvas extends JPanel{
 			@Override
 			public void mouseDragged(MouseEvent e) {
 				super.mouseDragged(e);
-				if(src!=null) {
+				if(src!=null) { //we have a valid point that the users wants to move
 					Point lastDst = dst;
 					dst = FieldCanvas.this.getClickPoint(e.getPoint());
 					if(lastDst!=dst && dst!=null) { //hovered field changed
 						if(freeMoveMode) {
+							//Check if the target position is empty and we could not move the block there in normal mode
 							if(!game.canMove(src, dst) && game.getField()[dst.x][dst.y]==0) {
+								//Create fake path with only src and dst
 								path = new ArrayList<Point>();
 								path.add(src);
 								path.add(dst);
 							} else {
 								path= null;
 							}
-						} else {
-							path= game.getPath(src, dst);
+						} else { //not in freemove mode
+							path= game.getPath(src, dst); //calculate path from src to dst (pathfinding)
 						}
 						repaint();
 					}
-				}else {
+				} else { //no valid src
 					dst = null;
 					path = null;
 				}
@@ -96,13 +99,13 @@ public class FieldCanvas extends JPanel{
 			public void mouseReleased(MouseEvent e) {
 				super.mouseReleased(e);
 				dst = FieldCanvas.this.getClickPoint(e.getPoint());
-				path = null;
+				path = null; //do no longer paint path
 				if(freeMoveMode) {
-					if(!game.canMove(src, dst)) {
+					if(!game.canMove(src, dst)) { //if we couldn't move there in normal mode
 						game.doFreeMove(src, dst);
 					}
-				} else {
-					if(dst != null && src!=null && !src.equals(dst)) {
+				} else { //not in freemove mode
+					if(dst != null && src!=null && !src.equals(dst)) { //src and dst are valid
 						System.out.println("Moving from "+src.toString()+ " to "+dst.toString());
 						game.doMove(src, dst);
 					}
@@ -147,11 +150,11 @@ public class FieldCanvas extends JPanel{
 	}
 	
 	/**
-	 * Calculates the position in which a click event has happened.
+	 * Maps a mouse position to game coordinates
 	 * 
 	 * @author timo
-	 * @param globalPos
-	 * @return Position of clickevent
+	 * @param globalPos Position of clickevent
+	 * @return point in game coordinates
 	 */
 	private Point getClickPoint(Point globalPos) {
 		int total = Math.min(this.getHeight()-borderTop-borderBottom,FieldCanvas.this.getWidth()-borderLeft-borderRight);
@@ -169,6 +172,8 @@ public class FieldCanvas extends JPanel{
 	 */
 	public void paintComponent(Graphics g) {
 		super.paintComponent(g);
+		
+		if(game==null) return;
 
 		//Draw field (background and lines)
 		if(freeMoveMode) {
@@ -180,21 +185,20 @@ public class FieldCanvas extends JPanel{
 		g.translate(borderLeft, borderTop);
 		int total = Math.min(this.getHeight()-borderTop-borderBottom,FieldCanvas.this.getWidth()-borderLeft-borderRight);
 		int space = total/game.getSize();
+		total = space*game.getSize();
 		
-		g.setClip(0, 0, total-4,total-4);
-		g.fillRect(0, 0, total-4,total-4);
+		g.setClip(0, 0, total+1,total+1);
+		g.fillRect(0, 0, total,total);
 		
 		g.setColor(Color.white);
 	
 		for(int i=0; i<=game.getSize(); i++) {
-			g.drawLine(0,i*space,total-2,i*space);
-			g.drawLine(i*space,0,i*space,total-2);
+			g.drawLine(0,i*space,total,i*space);
+			g.drawLine(i*space,0,i*space,total);
 		}
 	
-		if(game==null) return;
-		
-		//Draw blocks
 		
+		//Draw blocks		
 		for(int x=0; x<game.getSize(); x++) {
 			for(int y=0; y<game.getSize(); y++) {
 				int colorCode = game.getField()[x][y];
@@ -205,8 +209,7 @@ public class FieldCanvas extends JPanel{
 			}
 		}
 		
-		//Draw blocked fields
-		
+		//Draw blocked fields		
 		if(blockedFields!=null) {
 			g.setColor(Color.darkGray);
 			for(int i=0; i<blockedFields.size(); i++) {
diff --git a/src/ch/bfh/sevennotseven/Game.java b/src/ch/bfh/sevennotseven/Game.java
index 1bc038e..b5dd688 100644
--- a/src/ch/bfh/sevennotseven/Game.java
+++ b/src/ch/bfh/sevennotseven/Game.java
@@ -16,7 +16,7 @@ public class Game {
 	 *
 	 */
 	public interface UpdateListener  {
-		public void gameUpdate();
+		public void gameUpdated();
 	}
 	
 	// Constants
@@ -173,7 +173,7 @@ public class Game {
 	 */
 	private void emitUpdateEvent(){
 		for(UpdateListener e: updateListeners) {
-			e.gameUpdate();
+			e.gameUpdated();
 		}
 	}
 	
@@ -326,6 +326,8 @@ public class Game {
 		
 		// Populate game field
 		this.populateField();
+		
+		emitUpdateEvent();
 	}
 	
 	/**
diff --git a/src/ch/bfh/sevennotseven/NextMovesCanvas.java b/src/ch/bfh/sevennotseven/NextMovesCanvas.java
index e750a89..d37ecb6 100644
--- a/src/ch/bfh/sevennotseven/NextMovesCanvas.java
+++ b/src/ch/bfh/sevennotseven/NextMovesCanvas.java
@@ -6,7 +6,15 @@ import java.util.List;
 
 import javax.swing.JPanel;
 
-public class NextMovesCanvas extends JPanel {
+/**
+ * Class which renders the Blocks that will be placed next on the field
+ * @author timo
+ *
+ */
+public class NextMovesCanvas extends JPanel implements Game.UpdateListener {
+
+	private static final long serialVersionUID = 1L;
+
 	private Game game;
 	
 	static final int borderLeft = 1;
@@ -16,19 +24,17 @@ public class NextMovesCanvas extends JPanel {
 	
 	public NextMovesCanvas(Game g) {
 		this.game = g;
-		g.addUpdateListener(new Game.UpdateListener() {
-			@Override
-			public void gameUpdate() {
-				NextMovesCanvas.this.repaint();
-			}
-		});
+		g.addUpdateListener(this);
 	}
 	
+	@Override
+	public void gameUpdated() {
+		NextMovesCanvas.this.repaint();
+	}
 	
 	public void paintComponent(Graphics g) {
 		super.paintComponent(g);
 		
-		
 		g.setColor(Color.lightGray);
 		int height = getHeight() - borderTop-borderBottom;
 		
diff --git a/src/ch/bfh/sevennotseven/Window.java b/src/ch/bfh/sevennotseven/Window.java
index 802c7a3..a4d8dba 100644
--- a/src/ch/bfh/sevennotseven/Window.java
+++ b/src/ch/bfh/sevennotseven/Window.java
@@ -2,25 +2,28 @@ package ch.bfh.sevennotseven;
 
 import java.awt.BorderLayout;
 import java.awt.CardLayout;
+import java.awt.Component;
+import java.awt.Desktop;
 import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.HeadlessException;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
+import java.net.URI;
 
+import javax.swing.Box;
+import javax.swing.BoxLayout;
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 
 /**
- * Window class, places gui elements and listeners.
+ * Window class, contains the welcome screen and the game itself
  * 
  * @author timo
  */
-public class Window  extends JFrame implements ActionListener{
+public class Window  extends JFrame implements ActionListener, Game.UpdateListener {
 	
 	private static final long serialVersionUID = 1L;
 	private Game game;
@@ -29,6 +32,7 @@ public class Window  extends JFrame implements ActionListener{
 	
 	private JButton buttonUndo;
 	private JButton buttonFreeMove;
+	private JButton buttonReset;
 	private JLabel labelScore;
 	private JLabel labelLinesLeft;	
 	private JLabel labelLevel;
@@ -43,16 +47,27 @@ public class Window  extends JFrame implements ActionListener{
 	 */
 	public Window(String title) throws HeadlessException {
 		super(title);
-
-		this.addWindowListener(new WindowAdapter(){
-			@Override
-			public void windowClosing(WindowEvent e){
-				System.exit(0);
-			}
-		});
-		
 		
 		game = new Game();
+		game.addUpdateListener(this); //register for game updates
+		
+		initMainLayout();
+	}
+	
+	private void initMainLayout() {
+		mainPanel = new JPanel();
+		cardLayout = new CardLayout();
+		mainPanel.setLayout(cardLayout);
+		initWelcomeLayout();
+		initGameLayout();
+		this.setContentPane(mainPanel);
+		this.setSize(800,600);
+		this.setVisible(true);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	}
+	
+	private void initGameLayout() {
+		
 		moves = new NextMovesCanvas(game);	
 		field = new FieldCanvas(game);
 		
@@ -62,16 +77,23 @@ public class Window  extends JFrame implements ActionListener{
 		buttonFreeMove.setEnabled(false);
 		buttonFreeMove.addActionListener(this);
 		buttonFreeMove.setActionCommand("freemove");
+		
 		buttonUndo = new JButton("Undo (0)");
 		buttonUndo.setEnabled(false);
 		buttonUndo.addActionListener(this);
 		buttonUndo.setActionCommand("undo");
+		
+		buttonReset = new JButton("Reset");
+		buttonReset.addActionListener(this);
+		buttonReset.setActionCommand("reset");
+		
+		
 		labelScore= new JLabel("Score: 0");
 		labelLinesLeft = new JLabel("Lines Left: 40");
 		labelLevel = new JLabel("Level: 1");
 		
 		JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
-		
+		topPanel.add(buttonReset);
 		topPanel.add(buttonFreeMove);
 		topPanel.add(buttonUndo);
 		topPanel.add(labelScore);
@@ -84,50 +106,43 @@ public class Window  extends JFrame implements ActionListener{
 		buttonFreeMove.setText("Free Move ("+game.getAvailFreeMoves()+")");
 		buttonUndo.setText("Undo ("+game.getAvailUndo()+")");
 		
-		game.addUpdateListener(new Game.UpdateListener() {
-			
-			@Override
-			public void gameUpdate() {
-				labelScore.setText("Score: "+game.getScore());
-				buttonFreeMove.setEnabled(game.getAvailFreeMoves()>0);
-				buttonUndo.setEnabled(game.getAvailUndo()>0);
-				buttonFreeMove.setText("Free Move ("+game.getAvailFreeMoves()+")");
-				buttonUndo.setText("Undo ("+game.getAvailUndo()+")");
-				labelLinesLeft.setText("Lines Left: "+game.getLinesLeft());
-				labelLevel.setText("Level: "+game.getLevel());
-				
-			}
-		});
-		
+		JPanel gamePanel = new JPanel();
+		gamePanel.setLayout(new BorderLayout());
+		gamePanel.add(topPanel, BorderLayout.NORTH);
+		gamePanel.add(field);
+		mainPanel.add(gamePanel);
+	}
+	
+	private void initWelcomeLayout() {
 		JPanel welcomePanel = new JPanel();
+		welcomePanel.setLayout(new BoxLayout(welcomePanel, BoxLayout.Y_AXIS));
+		
+		JButton btnInstr = new JButton("Instructions & More");
+		btnInstr.setAlignmentX(Component.CENTER_ALIGNMENT);
+		btnInstr.setActionCommand("github");
+		btnInstr.addActionListener(this);
+		
+		welcomePanel.add(Box.createRigidArea(new Dimension(0,5)));
+		welcomePanel.add(btnInstr);
+		welcomePanel.add(Box.createRigidArea(new Dimension(0,10)));
+		
 		int sizes [] = {7,8,9,10};
 		for(int i=0; i<sizes.length; i++) {
 			JButton btn = new JButton(sizes[i]+"x"+sizes[i]);
 			btn.addActionListener(this);
 			btn.setActionCommand(Integer.toString(sizes[i]));
+			btn.setAlignmentX(Component.CENTER_ALIGNMENT);
+
 			welcomePanel.add(btn);
+			welcomePanel.add(Box.createRigidArea(new Dimension(0,5)));
 		}
 		
-		JPanel gamePanel = new JPanel();
-		gamePanel.setLayout(new BorderLayout());
-		gamePanel.add(topPanel, BorderLayout.NORTH);
-		gamePanel.add(field);
-		
-		mainPanel = new JPanel();
-		cardLayout = new CardLayout();
-		mainPanel.setLayout(cardLayout);
 		mainPanel.add(welcomePanel);
-		mainPanel.add(gamePanel);
-		
-		this.setContentPane(mainPanel);
-		
-		this.setSize(470,460);
-		this.setVisible(true);
-		
 	}
 	
 	/**
-	 * Action listener callback, determines which function to call.
+	 * Action listener callback: gets called when a button was pressed
+	 * The method will either start a game or forward an action to the game
 	 * 
 	 * @author timo
 	 * @param e ActionEvent
@@ -139,6 +154,17 @@ public class Window  extends JFrame implements ActionListener{
 			field.doUndo();
 		} else if (command.equals("freemove")) {
 			field.toggleFreeMove();
+		} else if(command.equals("github")) {
+			if(Desktop.isDesktopSupported()) {
+				final String url = "https://github.com/id101010/7not7/blob/master/README.md";
+				try {
+					Desktop.getDesktop().browse(new URI(url));
+				} catch(Exception ex) {
+					System.out.println("Couldn't open link: "+url+" "+ex.toString());
+				}
+			}
+		} else if(command.equals("reset")) {
+			cardLayout.first(mainPanel);
 		} else {
 			int size = Integer.parseInt(command);
 			cardLayout.last(mainPanel);
@@ -146,6 +172,21 @@ public class Window  extends JFrame implements ActionListener{
 		}
 		
 	}
+	
+	/**
+	 * GameUpdateListener: gets called when the games was updated (e.g. user made a move)
+	 */
+	@Override
+	public void gameUpdated() {
+		labelScore.setText("Score: "+game.getScore());
+		buttonFreeMove.setEnabled(game.getAvailFreeMoves()>0);
+		buttonUndo.setEnabled(game.getAvailUndo()>0);
+		buttonFreeMove.setText("Free Move ("+game.getAvailFreeMoves()+")");
+		buttonUndo.setText("Undo ("+game.getAvailUndo()+")");
+		labelLinesLeft.setText("Lines Left: "+game.getLinesLeft());
+		labelLevel.setText("Level: "+game.getLevel());
+		
+	}
 
 	/**
 	 * Main method