diff --git a/screen-share/client.py b/screen-share/client.py
index 2889ea0..c9a12f8 100644
--- a/screen-share/client.py
+++ b/screen-share/client.py
@@ -15,7 +15,6 @@ def send_screen():
             s.send(len(data).to_bytes(4, byteorder='big') + data)
         except:
             break
-        time.sleep(0.5)
 
 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 s.connect(("127.0.0.1", 9999))  # Replace with actual IP
diff --git a/submarine/main.py b/submarine/main.py
new file mode 100644
index 0000000..c4ff4c5
--- /dev/null
+++ b/submarine/main.py
@@ -0,0 +1,204 @@
+import pygame
+import math
+import random
+import sys
+
+pygame.init()
+
+# Constants
+WIDTH, HEIGHT = 1000, 600
+FPS = 60
+BLIP_FADE_TIME = 4000  # milliseconds
+
+# Init
+screen = pygame.display.set_mode((WIDTH, HEIGHT))
+pygame.display.set_caption("Polished Submarine Simulator")
+clock = pygame.time.Clock()
+
+# Colors
+BLACK = (10, 10, 20)
+DARK_GRAY = (40, 40, 60)
+GRAY = (100, 100, 120)
+LIGHT_GRAY = (160, 160, 180)
+WHITE = (255, 255, 255)
+GREEN = (0, 255, 0)
+RED = (255, 100, 100)
+YELLOW = (255, 255, 0)
+BLUE = (10, 40, 80)
+CYAN = (0, 255, 255)
+SONAR_BLIP = (0, 255, 180)
+
+# Fonts
+font = pygame.font.SysFont("consolas", 14)
+
+# Submarine state
+sub_x = 500
+sub_depth = 100.0
+speed = 0.0
+heading = 0.0
+
+# Terrain
+terrain_width = 5000
+seafloor = []
+def generate_seafloor():
+    y = 300
+    for _ in range(terrain_width):
+        y += random.uniform(-20, 20)
+        y = max(100, min(500, y))
+        seafloor.append(y)
+generate_seafloor()
+
+# Sonar system
+sonar_angle = 0
+sonar_radius = 120
+sonar_center = (WIDTH - 180, HEIGHT - 180)
+sonar_speed = 90
+blips = []
+sonar_mode = "active"  # can be 'active' or 'passive'
+
+# Player system
+interior_rect = pygame.Rect(50, 50, 600, 200)
+pilot_seat = pygame.Rect(90, 210, 30, 30)
+player = pygame.Rect(150, 210, 20, 40)
+player_vel = 100
+sitting = False
+
+# Personal stats
+oxygen = 100.0
+stamina = 100.0
+health = 100.0
+room_sealed = True
+
+# Draw gauges
+def draw_gauge(x, y, radius, label, value, min_val, max_val, unit, color):
+    pygame.draw.circle(screen, GRAY, (x, y), radius)
+    pygame.draw.circle(screen, BLUE, (x, y), radius - 6)
+    for i in range(11):
+        angle = math.radians(135 - i * 27)
+        dx = math.cos(angle) * (radius - 10)
+        dy = math.sin(angle) * (radius - 10)
+        pygame.draw.line(screen, WHITE, (x + int(dx), y + int(dy)), (x + int(dx / 2), y + int(dy / 2)), 2)
+    pct = (value - min_val) / (max_val - min_val)
+    angle = math.radians(135 - pct * 270)
+    dx = math.cos(angle) * (radius - 15)
+    dy = math.sin(angle) * (radius - 15)
+    pygame.draw.line(screen, color, (x, y), (x + int(dx), y + int(dy)), 4)
+    screen.blit(font.render(label, True, WHITE), (x - 25, y - radius + 5))
+    screen.blit(font.render(f"{value:.0f} {unit}", True, WHITE), (x - 30, y + radius - 20))
+
+# Main loop
+running = True
+while running:
+    dt = clock.tick(FPS) / 1000.0
+    now = pygame.time.get_ticks()
+
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            running = False
+        elif event.type == pygame.KEYDOWN:
+            if event.key == pygame.K_e and not sitting and player.colliderect(pilot_seat):
+                sitting = True
+                player.topleft = pilot_seat.topleft
+            elif event.key == pygame.K_ESCAPE and sitting:
+                sitting = False
+            elif event.key == pygame.K_TAB:
+                sonar_mode = "passive" if sonar_mode == "active" else "active"
+
+    keys = pygame.key.get_pressed()
+
+    if not sitting:
+        if keys[pygame.K_a] or keys[pygame.K_LEFT]: player.x -= int(player_vel * dt)
+        if keys[pygame.K_d] or keys[pygame.K_RIGHT]: player.x += int(player_vel * dt)
+        player.x = max(interior_rect.left, min(interior_rect.right - player.width, player.x))
+        if not room_sealed:
+            oxygen = max(0, oxygen - 10 * dt)
+    else:
+        if keys[pygame.K_w]: speed += 20 * dt
+        if keys[pygame.K_s]: speed -= 20 * dt
+        if keys[pygame.K_q]: heading -= 90 * dt
+        if keys[pygame.K_e]: heading += 90 * dt
+        if keys[pygame.K_r]: sub_depth -= 50 * dt
+        if keys[pygame.K_f]: sub_depth += 50 * dt
+
+    # Clamp values
+    speed = max(0, min(speed, 30))
+    sub_depth = max(0, min(sub_depth, 500))
+    heading %= 360
+    sub_x += math.cos(math.radians(heading)) * speed * dt
+
+    # Sonar logic
+    sonar_angle += sonar_speed * dt
+    sonar_angle %= 360
+    sweep_radians = math.radians(sonar_angle)
+    dx = math.cos(sweep_radians)
+    dy = math.sin(sweep_radians)
+    if sonar_mode == "active":
+        for i in range(20, sonar_radius):
+            ray_x = sub_x + dx * i
+            ray_y = sub_depth + dy * i
+            if 0 <= int(ray_x) < len(seafloor):
+                if ray_y >= seafloor[int(ray_x)]:
+                    blips.append((sonar_angle, i, now))
+                    break
+    elif sonar_mode == "passive":
+        # Passive sonar "listens" and picks up nearby terrain noise randomly
+        for _ in range(2):
+            angle = random.uniform(0, 360)
+            distance = random.randint(30, sonar_radius)
+            rad = math.radians(angle)
+            px = sub_x + math.cos(rad) * distance
+            py = sub_depth + math.sin(rad) * distance
+            if 0 <= int(px) < len(seafloor) and py >= seafloor[int(px)]:
+                blips.append((angle, distance, now))
+
+    # Clean expired blips
+    blips = [(a, d, t) for a, d, t in blips if now - t < BLIP_FADE_TIME]
+
+    # Draw everything
+    screen.fill(BLACK)
+    pygame.draw.rect(screen, DARK_GRAY, interior_rect, border_radius=15)
+    pygame.draw.rect(screen, LIGHT_GRAY, pilot_seat, border_radius=5)
+    pygame.draw.rect(screen, (220, 220, 255), player)
+    pygame.draw.line(screen, GRAY, (interior_rect.left + 10, interior_rect.bottom), (interior_rect.right - 10, interior_rect.bottom), 2)
+    pygame.draw.circle(screen, GRAY, (pilot_seat.centerx, pilot_seat.top - 10), 4)
+
+    # UI overlays
+    if sitting:
+        draw_gauge(100, HEIGHT - 120, 60, "Depth", sub_depth, 0, 500, "m", GREEN)
+        draw_gauge(220, HEIGHT - 120, 60, "Speed", speed, 0, 30, "kt", RED)
+        draw_gauge(340, HEIGHT - 120, 60, "Heading", heading, 0, 360, "°", YELLOW)
+    else:
+        draw_gauge(100, HEIGHT - 120, 60, "O₂", oxygen, 0, 100, "%", GREEN)
+        draw_gauge(220, HEIGHT - 120, 60, "Stamina", stamina, 0, 100, "%", YELLOW)
+        draw_gauge(340, HEIGHT - 120, 60, "Health", health, 0, 100, "%", RED)
+
+    # Sonar
+    pygame.draw.circle(screen, (0, 60, 100), sonar_center, sonar_radius)
+    pygame.draw.circle(screen, CYAN, sonar_center, sonar_radius, 2)
+    for angle, dist, timestamp in blips:
+        fade = max(0, min(255, 255 - ((now - timestamp) / BLIP_FADE_TIME) * 255))
+        rad = math.radians(angle)
+        bx = sonar_center[0] + math.cos(rad) * dist
+        by = sonar_center[1] + math.sin(rad) * dist
+        surf = pygame.Surface((4, 4), pygame.SRCALPHA)
+        pygame.draw.circle(surf, SONAR_BLIP + (int(fade),), (2, 2), 2)
+        screen.blit(surf, (bx - 2, by - 2))
+    end_x = sonar_center[0] + math.cos(sweep_radians) * sonar_radius
+    end_y = sonar_center[1] + math.sin(sweep_radians) * sonar_radius
+    pygame.draw.line(screen, CYAN, sonar_center, (end_x, end_y), 2)
+    pygame.draw.circle(screen, CYAN, sonar_center, 3)
+    mode_text = font.render(f"Sonar: {sonar_mode.upper()} (TAB)", True, WHITE)
+    screen.blit(mode_text, (sonar_center[0] - 60, sonar_center[1] + sonar_radius + 10))
+
+    # Prompts
+    if not sitting and player.colliderect(pilot_seat):
+        msg = font.render("Press E to sit", True, WHITE)
+        screen.blit(msg, (pilot_seat.x, pilot_seat.y - 20))
+    elif sitting:
+        msg = font.render("Press ESC to stand", True, WHITE)
+        screen.blit(msg, (pilot_seat.x, pilot_seat.y - 20))
+
+    pygame.display.flip()
+
+pygame.quit()
+sys.exit()
\ No newline at end of file