feat(game): add block movement

Allowed movemt keys are WASD, Arrow keys and vim motion keys

src/py2048/block.py

@@ -21,3 +21,7 @@ class Block(pygame.sprite.Sprite):
         text = font.render(str(self.value), True, COLORS.FG)
         text_rect = text.get_rect(center=self.image.get_rect().center)
         self.image.blit(text, text_rect)
+
+    def move(self, dx: int, dy: int) -> None:
+        self.rect.x += dx
+        self.rect.y += dy

src/py2048/game.py

@@ -14,7 +14,7 @@ class Game:
         self.screen = pygame.display.set_mode((Config.WIDTH, Config.HEIGHT))
         pygame.display.set_caption("2048")
         self.sprites = pygame.sprite.Group()
-        self.generate_random_block()
+        self.generate_random_block(Config.INITIAL_BLOCK_COUNT)
 
     def run(self) -> None:
         while True:
@@ -33,18 +33,36 @@ class Game:
     def hande_events(self) -> None:
         for event in pygame.event.get():
             if event.type == pygame.QUIT:
-                pygame.quit()
-                sys.exit()
+                self.exit()
+            elif event.type == pygame.KEYDOWN:
+                if event.key in (pygame.K_LEFT, pygame.K_a, pygame.K_h):
+                    self.move_blocks(-Config.BLOCK_SIZE, 0)
+                elif event.key in (pygame.K_RIGHT, pygame.K_d, pygame.K_l):
+                    self.move_blocks(Config.BLOCK_SIZE, 0)
+                elif event.key in (pygame.K_UP, pygame.K_w, pygame.K_k):
+                    self.move_blocks(0, -Config.BLOCK_SIZE)
+                elif event.key in (pygame.K_DOWN, pygame.K_s, pygame.K_j):
+                    self.move_blocks(0, Config.BLOCK_SIZE)
+                elif event.key == pygame.K_q:
+                    self.exit()
 
-    def generate_random_block(self) -> None:
-        for _ in range(Config.INITIAL_BLOCK_COUNT):
+    def move_blocks(self, dx, dy) -> None:
+        for block in self.sprites:
+            block.move(dx, dy)
+
+    def generate_random_block(self, count: int) -> None:
+        for _ in range(count):
             while True:
                 x = random.randint(0, 2) * Config.BLOCK_SIZE  # random column position
                 y = random.randint(0, 2) * Config.BLOCK_SIZE  # random row position
-
                 block = Block(x, y)
-                colligin_blocks = pygame.sprite.spritecollide(block, self.sprites, False)
+
+                colligin_blocks = pygame.sprite.spritecollide(block, self.sprites, False)  # check collision
 
                 if not colligin_blocks:
                     self.sprites.add(block)
                     break
+
+    def exit(self) -> None:
+        pygame.quit()
+        sys.exit()