More splitting and minor changes

Floor.py

@@ -0,0 +1,18 @@
+"""
+Floor entity class
+"""
+
+
+import pygame
+
+
+class Floor(pygame.sprite.Sprite):
+    def __init__(self, mainGameClass):
+        pygame.sprite.Sprite.__init__(self)
+        self.image = pygame.Surface((mainGameClass.getScreenWidth(),
+                                    mainGameClass.getFloorHeight()))
+        self.image.fill((255, 204, 102))
+        self.rect = self.image.get_rect()
+        self.rect.center = (mainGameClass.getScreenWidth()/2,
+                            mainGameClass.getScreenHeight() -
+                            mainGameClass.getFloorHeight()/2)