public void keyReleased(KeyEvent e) {
        // Stop moving players
        int key = e.getKeyCode();
        if (key == KeyEvent.VK_W) {
            p1.setVelY(0);
        } 
        else if (key == KeyEvent.VK_S) {
            p1.setVelY(0);
        } 
        else if (key == KeyEvent.VK_DOWN) {
            p2.setVelY(0);
        } 
        else if (key == KeyEvent.VK_UP) {
            p2.setVelY(0);
        }
    }