Index: README.md
===================================================================
--- README.md	(revision b632a7c694aa6b41c8683ae34c46ddd247dd06db)
+++ README.md	(revision b632a7c694aa6b41c8683ae34c46ddd247dd06db)
@@ -0,0 +1,3 @@
+On linux, you need to install tkinter:
+sudo apt-get install python3-tk
+
Index: game.py
===================================================================
--- game.py	(revision 3960923533ce45b213216e1d1139ec62a623a577)
+++ game.py	(revision b632a7c694aa6b41c8683ae34c46ddd247dd06db)
@@ -10,7 +10,13 @@
    import ctypes
    user32 = ctypes.windll.user32
-   [w, h] = [user32.GetSystemMetrics(0), user32.GetSystemMetrics(1)]
+   w = user32.GetSystemMetrics(0)
+   h = user32.GetSystemMetrics(1)
 elif system == 'Linux':
    print("Linux detected")
+
+   import tkinter
+   root = tkinter.Tk()
+   w = root.winfo_screenwidth()
+   h = root.winfo_screenheight()
 else:
    print("Unknown OS: " + system)