Custom widget won't save

Trying to make a custom “recent entries” widget (not plugin) and when I drag it into the sidebar and save the settings and refresh the page it’s not there.

This is the code found on recent-entries-widget.php:

<?php
/*
Plugin Name: Recent Entries Widget
Description: Recent posts widget with more options
Version: 1.0

*/

// Add recent_entries_widget function to widgets_init, this will load the widget

add_action( 'widgets_init', 'register_recent_entries_widget' );

// Register the widget

function register_recent_entries_widget() {
	register_widget( 'Recent_Entries_Widget' );
}

// Extend WP_Widget with our widget

class Recent_Entries_Widget extends WP_Widget {

	/* Initial Widget Setup */

	function Recent_Entries_Widget() {

		// Widget setup
		$widget_ops = array( 'classname' => 'recent-entries-widget', 'description' => __('Recent posts widget with more options.', 'framework') );

		// Widget UI
		$control_ops = array( 'width' => 250, 'height' => 350, 'id_base' => 'Recent_Entries_Widget' );

		// Widget name and description
		$this->WP_Widget( 'Recent_Entries_Widget', __('Recent Entries', 'framework'), $widget_ops, $control_ops );

	}

	/* Widget Content */

	function widget( $args, $instance ) {
		extract( $args );

		//Widget title, entered in the widget settings
		$title = apply_filters('widget_title', $instance['title'] );

		/* Custom Options */

		// Our options from the widget settings.
		$number = $instance['number'];

		// Before widget - as defined in your specific theme.
		echo $before_widget;

		/* Display The Widget */

		// Output the widget title if the user entered one in the widget options.
		if ( $title )
			echo $before_title . $title . $after_title;

			//Test The Widget Is Working
			echo "WIDGET TEST OUTPUT"; 

			/* After widget - as defined in your specific theme. */
			echo $after_widget;
	}	

	/* Update Options */

	function update( $new_instance, $old_instance ) {

		$instance = $old_instance;
		$instance['title'] = strip_tags( $new_instance['title'] );
		$instance['number'] = strip_tags( $new_instance['number'] );

		return $instance;
	}

	/* Widget Settings */

	function form( $instance ) {

		/* Default Widget Settings */

		$defaults = array(
			'title' => 'Recent Entries',
			'number' => '4'
		);

		$instance = wp_parse_args( (array) $instance, $defaults ); 

?>

	<p>
		<label for="<?php echo $this->get_field_id( 'title' ); ?>">Title:</label>
		<input type="text" class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="" />
	</p>

	<p class="post-amount">
		<label for="<?php echo $this->get_field_id( 'number' ); ?>">Number of entries to show:</label>
		<input style="width:15%;" type="text" class="widefat" id="<?php echo $this->get_field_id( 'number' ); ?>" name="<?php echo $this->get_field_name( 'number' ); ?>" value="" />
	</p>

<?php
	}
}