Fullscreen can misdisplay depending on available modes and, while there
is a command line option to enable it (-f), there is none to disable.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=432693
--- a/locals.py
+++ b/locals.py
@@ -18,2 +18,2 @@
     name = "Funny Boater"
-    fullscreen = True
+    fullscreen = False