After much thought and with the benefit of hindsight, we've decided to replace Challenge 2 (Believe it or not, the solution ... ) with a beginner's Javascript challenge. The change was made for the following reasons:
1) There wasn't any Javascript challenge until level 12. We felt it would be good to have one at the lower level as a starter Javascript challenge.
2) The original Level 2 challenge was tricky but didn't really require solving anything, if you know what I mean was too tricky too early.
3) A lot of people were stucked at that level and didn't have the chance to try the rest of the challenges.
We also modified Challenge 12 (originally the first Javascript challenge) to take into account the replacement of the level 2 challenge. The change isn't major and the challenge still retains much of its original favour and substance.
We'll also make it possible for you to re-play solved challenges. This will help you to "refresh" your memory of the challenges done as well as to better appreciate the after-thought changes made.