OpenGL Woes

package net.llamositopia.game;

import org.lwjgl.opengl.Display;

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.input.Keyboard.*;

public class TutorialGame extends Game {

    private float x,y;

    @Override
    public void init(){
        Display.setTitle("A Simple Rectangle");
        x = 0;
        y = 0;
        glClearColor(0, 0, 0, 1);
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();

        glMatrixMode(GL_MODELVIEW);
        glViewport(0, 0, Display.getWidth(), Display.getHeight());
        glOrtho(0, 800, 600, 0, -1, -1);
    }

    @Override
    public void update(long delta){
        if (isKeyDown(KEY_LEFT) || isKeyDown(KEY_A)){
            x -= 4;
        }
        if (isKeyDown(KEY_RIGHT) || isKeyDown(KEY_D)){
            x += 4;
        }
        if (isKeyDown(KEY_UP) || isKeyDown(KEY_W)){
            y -= 4;
        }
        if (isKeyDown(KEY_DOWN) || isKeyDown(KEY_S)){
            y += 4;
        }
        if (isKeyDown(KEY_ESCAPE)){
            end();
        }
    }

    @Override
    public void render(){
        glClear(GL_COLOR_BUFFER_BIT);
        glColor3f(1F, 1F, 1F);
        glPushMatrix();
        {
            glTranslatef(x, y, 0);
            glBegin(GL_QUADS);
            {
                glVertex2f(0, 0);
                glVertex2f(0, 100);
                glVertex2f(100, 100);
                glVertex2f(100, 0);
            }
            glEnd();
        }
        glPopMatrix();
    }

    @Override
    public void resized(){
        glViewport(0, 0, Display.getWidth(), Display.getHeight());
    }

}