diff --git a/README.md b/README.md
index 2f40e481..003ab912 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,4 @@ If you would like to add to the project, please make sure to follow these guidel
 Keep these things in mind:
 
 * Use 4 spaces instead of tabs
+* If you want, try to keep to the theme of black holes/gravity. This can add some fun to your submission.