diff --git a/engine/sdl2.py b/engine/sdl2.py
index 497ed58..09eb2ad 100644
--- a/engine/sdl2.py
+++ b/engine/sdl2.py
@@ -11,6 +11,7 @@ class GameWindow:
         self.cell_size = cell_size
         self.width = width * cell_size
         self.height = height * cell_size
+        print(f"Screen size: {self.width}x{self.height}")
         self.delay = 50
         sdl2.ext.init()
         self.window = sdl2.ext.Window(title=title, size=(self.width, self.height))
diff --git a/rats.py b/rats.py
index cc078cc..42b940b 100644
--- a/rats.py
+++ b/rats.py
@@ -11,7 +11,7 @@ class MiceMaze:
     def __init__(self, maze_file):
         self.map = maze.Map(maze_file)
         self.audio = True
-        self.cell_size = 60
+        self.cell_size = 40
         self.engine = engine.GameWindow(self.map.width, self.map.height, self.cell_size, "Mice!", key_callback=self.key_pressed)
         self.graphics_load()
         self.units = {}