场景获取事件：主循环获取事件后，事件被移除，在场景中再次获取将为空。所以在主循环获取时发送事件给场景类。

src/scenes/base_scene.py

@@ -3,3 +3,9 @@ import pygame
 class BaseScene:
     def __init__(self, screen: pygame.Surface):
         self.screen = screen
+
+    def update(self):
+        pass
+
+    def handle_event(self, events):
+        pass

src/scenes/main_menu_scene.py

@@ -4,6 +4,17 @@ from src.scenes.base_scene import BaseScene
 
 
 class MainMenuScene(BaseScene):
+    def __init__(self, screen):
+        super().__init__(screen)
+        self.button_status = False
 
     def update(self):
-        pygame.draw.rect(self.screen, Color.white, [10,20,30,40])
+        pygame.draw.rect(self.screen, Color.white, [10,20,30,40])
+        if self.button_status:
+            pygame.draw.rect(self.screen, Color.white, [50,20,30,40])
+
+    def handle_event(self, event):
+        if event.type == pygame.KEYDOWN:
+            self.button_status = True
+        if event.type == pygame.KEYUP:
+            self.button_status = False