misc updates

settings.py

@@ -11,7 +11,7 @@ YELLOW = (255, 255, 0)
 WIDTH = 800   # 16 * 64 or 32 * 32 or 64 * 16
 HEIGHT = 600  # 16 * 48 or 32 * 24 or 64 * 12
 FPS = 60
-TITLE = "Tilemap Demo"
+TITLE = "Sweeper Demo"
 BGCOLOR = DARKGREY
 
 TILESIZE = 50

super_mine.py

@@ -1,3 +1,7 @@
+import pygame
+from pygame.sprite import Sprite
+
+
 class SuperMine:
     def __init__(self, column, row, state, danger_level, striking_distanse, active):
         self.column = column