save project

my_game.py

@@ -19,6 +19,7 @@ hero = [pygame.image.load('hero1.png'),
 index = 0 
 y = 400
 jump_state = "run"
+n = 10
 
 while True:
     for event in pygame.event.get():
@@ -33,14 +34,17 @@ while True:
                 jump_state = "up"
     if jump_state == "up":
         if y > 150:
-            y -= 5
+            y -= n
+            n -= 0.2
         else:
             jump_state = "down"
     if jump_state == "down":
         if y < 400:
-            y += 5
+            y += n
+            n += 0.2      
         else:
             jump_state = "run"
+            y = 400
 
     # 将背景图画上去
     screen.blit(background, (0, 0))