feat: create main loop and game window

main.py

@@ -0,0 +1,20 @@
+import pygame
+
+def main():
+    pygame.init()
+
+    screen = pygame.display.set_mode((800, 600))
+    pygame.display.set_caption("Tetris")
+    icon = pygame.image.load("img/tetris_icon.png")
+    pygame.display.set_icon(icon)
+
+    is_running = True
+    while is_running:
+        for event in pygame.event.get():
+            if event.type == pygame.QUIT:
+                is_running = False
+
+        screen.fill((100, 149, 237))
+        pygame.display.update()
+
+main()