diff --git a/core/src/com/saltosion/gladiator/GladiatorBrawler.java b/core/src/com/saltosion/gladiator/GladiatorBrawler.java
index c7b0294..d80dc84 100644
--- a/core/src/com/saltosion/gladiator/GladiatorBrawler.java
+++ b/core/src/com/saltosion/gladiator/GladiatorBrawler.java
@@ -5,11 +5,14 @@ import com.badlogic.ashley.core.Entity;
 import com.badlogic.ashley.core.EntityListener;
 import com.badlogic.gdx.ApplicationAdapter;
 import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.Input;
 import com.badlogic.gdx.graphics.g2d.Sprite;
 import com.badlogic.gdx.math.Vector2;
 import com.saltosion.gladiator.components.CCombat;
 import com.saltosion.gladiator.components.CPhysics;
 import com.saltosion.gladiator.components.CRenderedObject;
+import com.saltosion.gladiator.gui.ButtonNode;
+import com.saltosion.gladiator.gui.GUIManager;
 import com.saltosion.gladiator.input.InputHandler;
 import com.saltosion.gladiator.listeners.CombatListener;
 import com.saltosion.gladiator.systems.CombatSystem;
@@ -19,6 +22,7 @@ import com.saltosion.gladiator.systems.RenderingSystem;
 import com.saltosion.gladiator.util.AppUtil;
 import com.saltosion.gladiator.util.Direction;
 import com.saltosion.gladiator.util.Global;
+import com.saltosion.gladiator.util.Log;
 import com.saltosion.gladiator.util.Name;
 import com.saltosion.gladiator.util.SpriteLoader;
 import com.saltosion.gladiator.util.SpriteSequence;
@@ -26,6 +30,7 @@ import com.saltosion.gladiator.util.SpriteSequence;
 public class GladiatorBrawler extends ApplicationAdapter {
 
 	private Engine engine;
+	private GUIManager guiManager;
 	private InputHandler inputHandler;
 
 	private Entity player;
@@ -66,6 +71,11 @@ public class GladiatorBrawler extends ApplicationAdapter {
 			}
 		});
 
+		// Initialize GUI
+		guiManager = new GUIManager();
+		AppUtil.guiManager = this.guiManager;
+		initializeTestGUI();
+		
 		// Initialize stuff in the world
 		initializePlayer();
 		initializeTestDummy();
@@ -161,6 +171,17 @@ public class GladiatorBrawler extends ApplicationAdapter {
 		engine.addEntity(wall0);
 		engine.addEntity(wall1);
 	}
+	
+	public void initializeTestGUI() {
+		Sprite img = SpriteLoader.loadSprite(Name.GROUNDIMG);
+		ButtonNode button = new ButtonNode("test-button", img, img) {
+			@Override
+			public void click(float x, float y, Input.Buttons mouseButton) {
+				Log.info("I should never be pressed!");
+			}
+		};
+		guiManager.getRootNode().addChild(button);
+	}
 
 	@Override
 	public void resize(int width, int height) {
diff --git a/core/src/com/saltosion/gladiator/gui/ButtonNode.java b/core/src/com/saltosion/gladiator/gui/ButtonNode.java
new file mode 100644
index 0000000..68169fc
--- /dev/null
+++ b/core/src/com/saltosion/gladiator/gui/ButtonNode.java
@@ -0,0 +1,33 @@
+package com.saltosion.gladiator.gui;
+
+import com.badlogic.gdx.graphics.g2d.Sprite;
+
+public abstract class ButtonNode extends GUINode implements InteractiveNode, ImageNode {
+	private final Sprite onHover;
+	private final Sprite normal;
+	private boolean hovered = false;
+	
+	public ButtonNode(String ID, Sprite onHover, Sprite normal) {
+		super(ID);
+		this.onHover = onHover; 
+		this.normal = normal;
+	}
+
+	@Override
+	public void mouseEnter(float x, float y) {
+		hovered = true;
+	}
+
+	@Override
+	public void mouseLeave(float x, float y){
+		hovered = false;
+	}
+
+	@Override
+	public Sprite getImage() {
+		if (hovered) {
+			return onHover;
+		}
+		return normal;
+	}
+}
diff --git a/core/src/com/saltosion/gladiator/gui/GUIManager.java b/core/src/com/saltosion/gladiator/gui/GUIManager.java
new file mode 100644
index 0000000..bd7fb43
--- /dev/null
+++ b/core/src/com/saltosion/gladiator/gui/GUIManager.java
@@ -0,0 +1,14 @@
+package com.saltosion.gladiator.gui;
+
+public class GUIManager {
+	private final GUINode rootNode;
+
+	public GUIManager() {
+		this.rootNode = new GUINode("root");
+	}
+	
+	public GUINode getRootNode() {
+		return this.rootNode;
+	}
+	
+}
diff --git a/core/src/com/saltosion/gladiator/gui/GUINode.java b/core/src/com/saltosion/gladiator/gui/GUINode.java
new file mode 100644
index 0000000..b11de33
--- /dev/null
+++ b/core/src/com/saltosion/gladiator/gui/GUINode.java
@@ -0,0 +1,64 @@
+package com.saltosion.gladiator.gui;
+
+import com.badlogic.gdx.math.Vector2;
+import java.util.ArrayList;
+
+public class GUINode {
+	private final Vector2 position;
+	private final ArrayList<GUINode> children;
+	private String ID = "";
+
+	public GUINode(String ID) {
+		this.ID = ID;
+		this.position = new Vector2();
+		this.children = new ArrayList<GUINode>();
+	}
+	
+	public GUINode setPosition(float x, float y) {
+		this.position.set(x, y);
+		return this;
+	}
+	
+	public GUINode setPosition(Vector2 pos) {
+		this.position.set(pos);
+		return this;
+	}
+	
+	public GUINode setID(String ID) {
+		this.ID = ID;
+		return this;
+	}
+	
+	public GUINode addChild(GUINode node) {
+		this.children.add(node);
+		return this;
+	}
+	
+	public GUINode removeChild(String id) {
+		for (GUINode child : this.children) {
+			if (child.ID.equals(id)) {
+				this.children.remove(child);
+				break;
+			}
+		}
+		return this;
+	}
+	
+	public GUINode removeChild(GUINode node) {
+		this.children.remove(node);
+		return this;
+	}
+	
+	public GUINode clearChildren() {
+		this.children.clear();
+		return this;
+	}
+	
+	public Vector2 getPosition() {
+		return this.position;
+	}
+	
+	public String getID() {
+		return this.ID;
+	}
+}
diff --git a/core/src/com/saltosion/gladiator/gui/ImageNode.java b/core/src/com/saltosion/gladiator/gui/ImageNode.java
new file mode 100644
index 0000000..a73b43c
--- /dev/null
+++ b/core/src/com/saltosion/gladiator/gui/ImageNode.java
@@ -0,0 +1,8 @@
+package com.saltosion.gladiator.gui;
+
+import com.badlogic.gdx.graphics.g2d.Sprite;
+
+public interface ImageNode {
+	
+	public Sprite getImage();
+}
diff --git a/core/src/com/saltosion/gladiator/gui/InteractiveNode.java b/core/src/com/saltosion/gladiator/gui/InteractiveNode.java
new file mode 100644
index 0000000..f1e2e46
--- /dev/null
+++ b/core/src/com/saltosion/gladiator/gui/InteractiveNode.java
@@ -0,0 +1,27 @@
+package com.saltosion.gladiator.gui;
+
+import com.badlogic.gdx.Input.Buttons;
+
+public interface InteractiveNode {
+	/**
+	 * Called when the mouse enters the node's elements.
+	 * @param x position of the mouse.
+	 * @param y position of the mouse.
+	 */
+	public void mouseEnter(float x, float y);
+	
+	/**
+	 * Called when the mouse leaves the node's elements.
+	 * @param x position of the mouse.
+	 * @param y position of the mouse.
+	 */
+	public void mouseLeave(float x, float y);
+	
+	/**
+	 * Called when someone presses a mouse button on the node's elements.
+	 * @param x position of the mouse.
+	 * @param y position of the mouse.
+	 * @param mouseButton button pressed.
+	 */
+	public void click(float x, float y, Buttons mouseButton);
+}
diff --git a/core/src/com/saltosion/gladiator/util/AppUtil.java b/core/src/com/saltosion/gladiator/util/AppUtil.java
index 6112ddc..1d1e93e 100644
--- a/core/src/com/saltosion/gladiator/util/AppUtil.java
+++ b/core/src/com/saltosion/gladiator/util/AppUtil.java
@@ -3,11 +3,13 @@ package com.saltosion.gladiator.util;
 import com.badlogic.ashley.core.Engine;
 import com.badlogic.ashley.core.Entity;
 import com.badlogic.gdx.math.Vector2;
+import com.saltosion.gladiator.gui.GUIManager;
 
 public class AppUtil {
 
     public static Entity player;
     public static Engine engine;
+	public static GUIManager guiManager;
 
     public static final int VPHEIGHT_CONST = 24;