save project

my_game.py

@@ -25,24 +25,27 @@ while True:
         if event.type == locals.QUIT:
             exit()
         if event.type==locals.KEYDOWN:
-            if event.key==locals.K_SPACE:
-                c='up'
+            if c=='run':
+                if event.key==locals.K_SPACE:
+                    c='up'
     if c=='up':
-        if t>0:
+        if t>=0:
             y-=t
             t-=2
         else:
             c='down'
     if c=='down':
-        if t<30:
+        if t<=30:
             y+=t
             t+=2
         else:
             c='run'
+            t=30
     w=b[a]
-    a+=1
-    if a>4:
-        a=0
+    if c=='run':
+        a+=1
+        if a>4:
+            a=0
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(road, (0, 500))