Simple GUI game on Java. The main goal is to hit a target on the screen as faster as you can.

Clicker.java

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;


public class Clicker extends JFrame
    implements Runnable, ActionListener {
        private Thread th = null;
        // Window size
        private int width = 1100;
        private int height = 1000;
        // Target coordinates
        private int x = 0;
        private int y = 0;
        // Counter of clicks on target
        private int count = 0;
        // Argument for sleep() [Defines moves speed of target]
        private int speed = 1500;
        // Component for drawing
        private Canvas canvas;
        // Start/pause button
        private Button button;
        // Flag -- is button pressed
        private boolean button_flag = true;
        // Random for generating random coordinates
        private Random rand = new Random(1000);
        // Color of information messages
        private Color color = Color.RED;
        
    public Clicker() {
        setTitle("Game: Clicker");
        setSize(width,height);
        
        canvas = new Canvas() {
            public void paint(Graphics g) {
                // Drawing of target
                g.setColor(Color.BLACK);
                g.fillRect(x,y,50,50);
                // Drawing of counter (hits)
                g.setFont(new Font ("TimesRoman", Font.BOLD, 18));
                g.setColor(Color.YELLOW);
                g.drawString(""+count, x+20, y+29);
                // Info message about game speed
                g.setColor(color);
                g.drawString("Sleep: "+speed, 850,900);
                // Info about goal score
                g.setColor(color);
                g.drawString("Need: 100", 20, 20 );
                // Winning message
                g.setFont(new Font ("TimesRoman", Font.BOLD, 200));
                g.setColor(Color.PINK);
                if(count > 100) g.drawString("GOOD JOB", 0, 500);   
            }
        };
                
        canvas.addMouseListener(new MouseListener() {
            public void mouseClicked(MouseEvent e) {

                // Is click on target
                if (e.getX() > x && e.getX() < (x+50) && e.getY()> y && e.getY() < y+50)
                {
                    count++;
                    speed +=5; 
                    canvas.repaint();
                }
            }
            public void mouseEntered(MouseEvent e) {}
            public void mousePressed(MouseEvent e) {}
            public void mouseReleased(MouseEvent e) {}
            public void mouseExited(MouseEvent e) {}    
        });
        
        button = new Button("Start/Pause");
        button.addActionListener(this); 
        
        add(button, BorderLayout.NORTH);
        add(canvas, BorderLayout.CENTER);
        
        setVisible(true);
        
        th = new Thread(this);
        th.start(); 
    }
    
    public void actionPerformed(ActionEvent ae) {
        if ( button == ae.getSource()) {
            if ( button_flag == true ) {
                button_flag = false; 
            }
            else {
                button_flag = true;
            }
        }
    }
    
    public void run() {
        while (true) {
            
            width = getWidth();
            height = getHeight();
            // Generate random coordinates
            try {
                x = rand.nextInt(width-200);
                y = rand.nextInt(height-100);
            } catch ( IllegalArgumentException ie ) {
                x = 0;
                y = 0;
            }
    
            while (!button_flag) {
                try {
                    th.sleep(200);
                } catch(InterruptedException e) {}
            }

            try {
                th.sleep(this.speed);
            } catch(InterruptedException e) {}
            // Limit of game speed
            if (speed > 500) 
                speed-=10; 
            // Random color for goal score info
            color = new Color(rand.nextInt(255),rand.nextInt(255),rand.nextInt(255));
            
            this.canvas.repaint();
        
        }
    }
    
    public static void main(String[] args) {
        Clicker game = new Clicker();
    }
}

how_to_play.txt

# Depenpency: jdk-7

# 1. Download
# 2. Compile
javac Clicker.java
# 3. Run
java Clicker

preview.md

Preview