diff --git a/.env b/.env
new file mode 100644
index 00000000..fc67dbdf
--- /dev/null
+++ b/.env
@@ -0,0 +1,2 @@
+# adjust TILE_SIZE to fit your screen well
+TILE_SIZE=64
diff --git a/src/main.py b/src/main.py
index 59d010fd..07a82ec6 100644
--- a/src/main.py
+++ b/src/main.py
@@ -1,12 +1,16 @@
 import sys
 import pygame
 from field import Field
+import os
+from dotenv import find_dotenv, load_dotenv
 
 if __name__ == "__main__":
     pygame.init()
     WHITE = (255, 255, 255)
-    SCREEN_WIDTH, SCREEN_HEIGHT = 1024, 1024
-    screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
+    # loading TILE_SIZE to adjust window size
+    load_dotenv(find_dotenv())
+    WINDOW_SIZE = int(os.getenv("TILE_SIZE")) * 16
+    screen = pygame.display.set_mode((WINDOW_SIZE, WINDOW_SIZE))
     field = Field()
     running = True
     while running:
diff --git a/src/tile.py b/src/tile.py
index b671d16a..2082e45b 100644
--- a/src/tile.py
+++ b/src/tile.py
@@ -1,5 +1,6 @@
 import os
 import pygame
+from dotenv import find_dotenv, load_dotenv
 
 class Tile(pygame.sprite.Sprite):
     def __init__(self, id, type, field):
@@ -11,7 +12,10 @@ class Tile(pygame.sprite.Sprite):
         self.field = field
         self.set_type(type)
         self.rect = self.image.get_rect()
-        self.rect.topleft = (x * 64, y * 64)
+        # you can set TILE_SIZE in the .env file to adjust the window size
+        load_dotenv(find_dotenv())
+        TILE_SIZE = int(os.getenv("TILE_SIZE"))
+        self.rect.topleft = (x * TILE_SIZE, y * TILE_SIZE)
     
     def draw(self, surface):
         self.tiles.draw(surface)
@@ -20,6 +24,9 @@ class Tile(pygame.sprite.Sprite):
         self.type = type
         if self.type == 'grass':
             self.image = pygame.image.load('src/images/grass.png').convert()
-        self.image = pygame.transform.scale(self.image, (64, 64))
+        # you can set TILE_SIZE in the .env file to adjust the window size
+        load_dotenv(find_dotenv())
+        TILE_SIZE = int(os.getenv("TILE_SIZE"))
+        self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
 
     
diff --git a/src/tractor.py b/src/tractor.py
index d781e697..e332c53a 100644
--- a/src/tractor.py
+++ b/src/tractor.py
@@ -1,11 +1,16 @@
 import pygame
 import os
+from dotenv import find_dotenv, load_dotenv
+
 class Tractor(pygame.sprite.Sprite):
     def __init__(self, field):
         super().__init__
         self.field = field
         self.image = pygame.image.load('src/images/tractor.png').convert_alpha()
-        self.image = pygame.transform.scale(self.image, (64, 64))
+        # you can set TILE_SIZE in the .env to adjust window size
+        load_dotenv(find_dotenv())
+        TILE_SIZE = int(os.getenv("TILE_SIZE"))
+        self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
         self.rect = self.image.get_rect()
         x, y = 0, 0
         self.rect.topleft = (x, y)
@@ -14,14 +19,18 @@ class Tractor(pygame.sprite.Sprite):
         surface.blit(self.image, self.rect)
 
     def move(self, direction):
+        # you can set TILE_SIZE in the .env to adjust window size     
+        load_dotenv(find_dotenv())
+        TILE_SIZE = int(os.getenv("TILE_SIZE"))
+
         if direction == "up":
-            self.rect.y -= 64
+            self.rect.y -= TILE_SIZE
         elif direction == "down":
-            self.rect.y += 64
+            self.rect.y += TILE_SIZE
         elif direction == "left":
-            self.rect.x -= 64
+            self.rect.x -= TILE_SIZE
         elif direction == "right":
-            self.rect.x += 64
+            self.rect.x += TILE_SIZE
 
     def update(self):
         keys = pygame.key.get_pressed()