diff --git a/README.md b/README.md
index 3f4ae92..4ec1653 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,18 @@
-# Practice JavaScript using game stuffs
+# Practice JavaScript using this fun game
 
 [ ![Codeship Status for PracticeJavaScript/practicejavascript.com](https://app.codeship.com/projects/091c0e50-0a7c-0135-8b3c-6ed4d7e33e57/status?branch=master)](https://app.codeship.com/projects/214753)
 [![Build Status](https://travis-ci.org/PracticeJavaScript/practicejavascript.com.svg?branch=master)](https://travis-ci.org/PracticeJavaScript/practicejavascript.com)
 
-- Should be rote, easy problems, to exercise mastery, rather than solving brain puzzles like other sites
+![ScreenShot of practicejavascript.com](https://cldup.com/I24bQvI37L.png)
+
+## Principles
+- Fast, easy to start. No delays.
+- Keep it simple. As few visual elements as possible.
+- Never leave the keyboard.
+- Fast and rewarding feedback loop like a mobile game. Obey ["Doherty Threshold"](http://daverupert.com/2015/06/doherty-threshold/)
+
+
+- True katas should be rote, easy problems, solved a variety of ways, to exercise mastery, rather than solving longer brain puzzles like other sites
 - Should be solvable in under 30 seconds each
 
 
diff --git a/src/problems/arrays.js b/src/problems/arrays.js
index d339584..859dca3 100644
--- a/src/problems/arrays.js
+++ b/src/problems/arrays.js
@@ -472,7 +472,7 @@ module.exports = [
   {
     name: 'Array.filter()',
     time: 10,
-    prompt: `return an array of the numbers greater than 5 in 'fruits' using 'Array.filter()'`,
+    prompt: `Return an array of the numbers greater than 5 in 'fruits' using 'Array.filter()'`,
     given: `const numbers = [1, 1, 2, 3, 5, 8, 13, 21];\r`,
     answer: `const numbers = [1, 1, 2, 3, 5, 8, 13, 21];
              const overFive = numbers.filter(num => num > 5);