diff --git a/pygame-imgui/__pycache__/pygui.cpython-311.pyc b/pygame-imgui/__pycache__/pygui.cpython-311.pyc
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diff --git a/pygame-imgui/__pycache__/pygui_pygame_backend.cpython-311.pyc b/pygame-imgui/__pycache__/pygui_pygame_backend.cpython-311.pyc
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diff --git a/pygame-imgui/example.py b/pygame-imgui/example.py
index e69de29..ef3e189 100644
--- a/pygame-imgui/example.py
+++ b/pygame-imgui/example.py
@@ -0,0 +1,87 @@
+import pygame
+import sys
+import math
+import pygui
+from pygui_pygame_backend import Render, Rect, get_mouse_pos, get_mouse_pressed, MOUSEBUTTONDOWN, MOUSEBUTTONUP, MOUSEMOTION
+import pygui_pygame_backend as backend
+
+pygame.init()
+WIDTH, HEIGHT = 800, 600
+screen = pygame.display.set_mode((WIDTH, HEIGHT))
+pygame.display.set_caption("Bouncing Ball with Enhanced PyGUI")
+clock = pygame.time.Clock()
+
+# Create the backend renderer and assign the backend to PyGUI.
+renderer = Render(screen)
+pygui.PyGUI.set_backend(backend, renderer)
+
+# ---------------------
+# Ball Simulation
+# ---------------------
+class Ball:
+    def __init__(self, pos, velocity, radius, color):
+        self.pos = list(pos)
+        self.velocity = list(velocity)
+        self.radius = radius
+        self.color = color
+
+    def update(self):
+        self.pos[0] += self.velocity[0]
+        self.pos[1] += self.velocity[1]
+        if self.pos[0] - self.radius < 0 or self.pos[0] + self.radius > WIDTH:
+            self.velocity[0] = -self.velocity[0]
+        if self.pos[1] - self.radius < 0 or self.pos[1] + self.radius > HEIGHT:
+            self.velocity[1] = -self.velocity[1]
+
+    def draw(self, surface):
+        pygame.draw.circle(surface, self.color, (int(self.pos[0]), int(self.pos[1])), int(self.radius))
+
+ball = Ball((WIDTH // 2, HEIGHT // 2), (4, 3), 30, (255, 100, 50))
+ball_speed = 4.0
+ball_direction = 0.0
+ball_radius = 30.0
+ball_color_r = 255.0
+ball_color_g = 100.0
+ball_color_b = 50.0
+bounce_enabled = True
+
+running = True
+while running:
+    dt = clock.tick(60) / 1000.0
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            running = False
+        pygui.PyGUI.handle_event(event)
+
+    screen.fill((30, 30, 30))
+
+    # Draw a draggable, auto–sizing GUI window.
+    pygui.PyGUI.Begin("Ball Controls", 10, 10)
+    ball_speed = pygui.PyGUI.Slider("Speed", ball_speed, 1, 10)
+    ball_direction = pygui.PyGUI.Slider("Direction", ball_direction, 0, 360)
+    ball_radius = pygui.PyGUI.Slider("Radius", ball_radius, 10, 100)
+    ball_color_r = pygui.PyGUI.Slider("Red", ball_color_r, 0, 255)
+    ball_color_g = pygui.PyGUI.Slider("Green", ball_color_g, 0, 255)
+    ball_color_b = pygui.PyGUI.Slider("Blue", ball_color_b, 0, 255)
+    bounce_enabled = pygui.PyGUI.Checkbox("Bounce", bounce_enabled)
+    if pygui.PyGUI.Button("Reset Position"):
+        ball.pos = [WIDTH // 2, HEIGHT // 2]
+    pygui.PyGUI.End()
+
+    rad = math.radians(ball_direction)
+    ball.velocity[0] = ball_speed * math.cos(rad)
+    ball.velocity[1] = ball_speed * math.sin(rad)
+    ball.radius = ball_radius
+    ball.color = (int(ball_color_r), int(ball_color_g), int(ball_color_b))
+    if not bounce_enabled:
+        ball.velocity[0] *= 0.5
+        ball.velocity[1] *= 0.5
+
+    ball.update()
+    ball.draw(screen)
+
+    pygame.display.flip()
+    pygui.PyGUI.update()
+
+pygame.quit()
+sys.exit()
diff --git a/pygame-imgui/pygui.py b/pygame-imgui/pygui.py
index e69de29..fb48453 100644
--- a/pygame-imgui/pygui.py
+++ b/pygame-imgui/pygui.py
@@ -0,0 +1,194 @@
+# pygui.py: Immediate–mode GUI library.
+# This file contains no direct Pygame calls—it relies entirely on functions supplied by the backend.
+# The backend must supply: Rect, get_mouse_pos, get_mouse_pressed,
+# and event type constants: MOUSEBUTTONDOWN, MOUSEBUTTONUP, MOUSEMOTION.
+
+class Window:
+    TITLE_HEIGHT = 30
+    PADDING = 5
+    SPACING = 5
+
+    def __init__(self, title, x, y, width=None, height=None):
+        self.title = title
+        self.x = x
+        self.y = y
+        self.width = width if width is not None else 200
+        # Start with a minimal height if none is provided.
+        self.height = height if height is not None else (self.TITLE_HEIGHT + self.PADDING)
+        self.cursor_y = self.y + self.TITLE_HEIGHT + self.PADDING
+        self.dragging = False
+        self.drag_offset = (0, 0)
+
+    @property
+    def rect(self):
+        return Window.backend.Rect(self.x, self.y, self.width, self.height)
+
+    @property
+    def title_rect(self):
+        return Window.backend.Rect(self.x, self.y, self.width, self.TITLE_HEIGHT)
+
+    def handle_event(self, ev):
+        # ev is a dictionary with keys: type, button, pos.
+        if ev.get('type') == 'MOUSEBUTTONDOWN':
+            if ev.get('button') == 1 and self.title_rect.collidepoint(ev.get('pos')):
+                self.dragging = True
+                self.drag_offset = (ev.get('pos')[0] - self.x, ev.get('pos')[1] - self.y)
+        elif ev.get('type') == 'MOUSEBUTTONUP':
+            if ev.get('button') == 1:
+                self.dragging = False
+        elif ev.get('type') == 'MOUSEMOTION':
+            if self.dragging:
+                self.x = ev.get('pos')[0] - self.drag_offset[0]
+                self.y = ev.get('pos')[1] - self.drag_offset[1]
+                self.cursor_y = self.y + self.TITLE_HEIGHT + self.PADDING
+
+    def begin(self, render):
+        render.draw_rect((50, 50, 50), self.rect.rect)
+        render.draw_rect((70, 70, 70), self.title_rect.rect)
+        render.draw_text(self.title, (self.x + self.PADDING, self.y + 5))
+        self.cursor_y = self.y + self.TITLE_HEIGHT + self.PADDING
+
+    def layout(self):
+        return (self.x + self.PADDING, self.cursor_y)
+
+    def next(self, widget_height):
+        self.cursor_y += widget_height + self.SPACING
+
+class PyGUI:
+    # These are assigned via set_backend.
+    backend = None
+    renderer = None
+
+    current_window = None
+    windows = []
+    active_slider = None   # Stores (window_id, label, offset)
+    prev_mouse = False     # For one–click widget toggling
+
+    @staticmethod
+    def set_backend(backend, renderer):
+        """
+        backend: an object that provides Rect, get_mouse_pos, get_mouse_pressed,
+                 and event type constants: MOUSEBUTTONDOWN, MOUSEBUTTONUP, MOUSEMOTION.
+        renderer: an instance of the backend’s Render class.
+        """
+        PyGUI.backend = backend
+        PyGUI.renderer = renderer
+        Window.backend = backend
+
+    @staticmethod
+    def Begin(title, x, y, width=None, height=None):
+        win = Window(title, x, y, width, height)
+        PyGUI.current_window = win
+        PyGUI.windows.append(win)
+        win.begin(PyGUI.renderer)
+
+    @staticmethod
+    def End():
+        if PyGUI.current_window:
+            win = PyGUI.current_window
+            # Auto–resize window height to enclose all widgets.
+            win.height = win.cursor_y - win.y + win.PADDING
+        PyGUI.current_window = None
+
+    @staticmethod
+    def Label(text):
+        if not PyGUI.current_window:
+            return
+        win = PyGUI.current_window
+        pos = win.layout()
+        PyGUI.renderer.draw_text(text, pos)
+        win.next(20)
+
+    @staticmethod
+    def Button(text):
+        if not PyGUI.current_window:
+            return False
+        win = PyGUI.current_window
+        btn_rect = PyGUI.backend.Rect(win.x + win.PADDING, win.cursor_y, win.width - 2 * win.PADDING, 25)
+        PyGUI.renderer.draw_rect((100, 100, 100), btn_rect.rect)
+        PyGUI.renderer.draw_text(text, (btn_rect.x + 5, btn_rect.y + 5))
+        clicked = False
+        mouse_pos = PyGUI.backend.get_mouse_pos()
+        if btn_rect.collidepoint(mouse_pos):
+            PyGUI.renderer.draw_rect((150, 150, 150), btn_rect.rect, border=2)
+            if PyGUI.backend.get_mouse_pressed()[0]:
+                clicked = True
+        win.next(25)
+        return clicked
+
+    @staticmethod
+    def Slider(label, value, min_val, max_val):
+        if not PyGUI.current_window:
+            return value
+        win = PyGUI.current_window
+        pos = win.layout()
+        text = f"{label}: {value:.2f}"
+        PyGUI.renderer.draw_text(text, pos)
+        win.next(20)
+        slider_width = win.width - 2 * win.PADDING
+        slider_rect = PyGUI.backend.Rect(win.x + win.PADDING, win.cursor_y, slider_width, 10)
+        PyGUI.renderer.draw_rect((100, 100, 100), slider_rect.rect)
+        norm = (value - min_val) / (max_val - min_val)
+        knob_x = win.x + win.PADDING + norm * slider_width
+        knob_rect = PyGUI.backend.Rect(knob_x - 5, win.cursor_y - 5, 10, 20)
+        PyGUI.renderer.draw_rect((200, 200, 200), knob_rect.rect)
+
+        slider_id = (id(win), label)
+        mp = PyGUI.backend.get_mouse_pos()
+        mp_pressed = PyGUI.backend.get_mouse_pressed()[0]
+        # Start slider drag if none active and mouse is pressed inside slider_rect.
+        if PyGUI.active_slider is None and slider_rect.collidepoint(mp) and mp_pressed:
+            offset = mp[0] - knob_x
+            PyGUI.active_slider = (slider_id, offset)
+        if PyGUI.active_slider is not None and PyGUI.active_slider[0] == slider_id:
+            offset = PyGUI.active_slider[1]
+            rel = mp[0] - (win.x + win.PADDING) - offset
+            norm = max(0, min(rel / slider_width, 1))
+            value = min_val + norm * (max_val - min_val)
+        if not mp_pressed:
+            PyGUI.active_slider = None
+        win.next(20)
+        return value
+
+    @staticmethod
+    def Checkbox(label, value):
+        if not PyGUI.current_window:
+            return value
+        win = PyGUI.current_window
+        pos = win.layout()
+        box_rect = PyGUI.backend.Rect(win.x + win.PADDING, win.cursor_y, 20, 20)
+        PyGUI.renderer.draw_rect((100, 100, 100), box_rect.rect, border=2)
+        if value:
+            PyGUI.renderer.draw_rect((200, 200, 200), box_rect.rect)
+        PyGUI.renderer.draw_text(label, (box_rect.x + box_rect.width + 5, win.cursor_y))
+        new_value = value
+        mp = PyGUI.backend.get_mouse_pos()
+        mp_pressed = PyGUI.backend.get_mouse_pressed()[0]
+        # Toggle only on the transition (mouse pressed now but not in the previous frame).
+        if box_rect.collidepoint(mp) and mp_pressed and not PyGUI.prev_mouse:
+            new_value = not value
+        win.next(20)
+        return new_value
+
+    @staticmethod
+    def handle_event(event):
+        # Convert a backend event (e.g. a Pygame event) into a generic dictionary.
+        generic = {}
+        if event.type == PyGUI.backend.MOUSEBUTTONDOWN:
+            generic['type'] = 'MOUSEBUTTONDOWN'
+            generic['button'] = event.button
+            generic['pos'] = event.pos
+        elif event.type == PyGUI.backend.MOUSEBUTTONUP:
+            generic['type'] = 'MOUSEBUTTONUP'
+            generic['button'] = event.button
+            generic['pos'] = event.pos
+        elif event.type == PyGUI.backend.MOUSEMOTION:
+            generic['type'] = 'MOUSEMOTION'
+            generic['pos'] = event.pos
+        for win in PyGUI.windows:
+            win.handle_event(generic)
+
+    @staticmethod
+    def update():
+        # Call at end of frame to record the current mouse state (for one–click toggling).
+        PyGUI.prev_mouse = PyGUI.backend.get_mouse_pressed()[0]
diff --git a/pygame-imgui/pygui_pygame_backend.py b/pygame-imgui/pygui_pygame_backend.py
new file mode 100644
index 0000000..f098a01
--- /dev/null
+++ b/pygame-imgui/pygui_pygame_backend.py
@@ -0,0 +1,59 @@
+import pygame
+
+# Event type constants.
+MOUSEBUTTONDOWN = pygame.MOUSEBUTTONDOWN
+MOUSEBUTTONUP   = pygame.MOUSEBUTTONUP
+MOUSEMOTION     = pygame.MOUSEMOTION
+
+class Render:
+    """
+    Provides basic drawing functions via Pygame.
+    """
+    def __init__(self, surface):
+        self.surface = surface
+        self.font = pygame.font.SysFont("Arial", 16)
+
+    def draw_rect(self, color, rect, border=0):
+        pygame.draw.rect(self.surface, color, rect, border)
+
+    def draw_text(self, text, pos, color=(255, 255, 255)):
+        text_surface = self.font.render(text, True, color)
+        self.surface.blit(text_surface, pos)
+
+    def draw_line(self, color, start_pos, end_pos, width=1):
+        pygame.draw.line(self.surface, color, start_pos, end_pos, width)
+
+    def draw_circle(self, color, center, radius, border=0):
+        pygame.draw.circle(self.surface, color, center, radius, border)
+
+class Rect:
+    """
+    A simple rectangle wrapper.
+    """
+    def __init__(self, x, y, width, height):
+        self.rect = pygame.Rect(x, y, width, height)
+
+    @property
+    def x(self):
+        return self.rect.x
+
+    @property
+    def y(self):
+        return self.rect.y
+
+    @property
+    def width(self):
+        return self.rect.width
+
+    @property
+    def height(self):
+        return self.rect.height
+
+    def collidepoint(self, pos):
+        return self.rect.collidepoint(pos)
+
+def get_mouse_pos():
+    return pygame.mouse.get_pos()
+
+def get_mouse_pressed():
+    return pygame.mouse.get_pressed()