Since I stumbled upon this post by sheer coincidence, I wanted to thank you for spreading the word! It's great to see so many happy readers find the book and I'd like to see the free download go to as many Construct 2 users as possible (it did well, but you guys are the ones I'd like to see the book go to). Said this, those who want to be informed about future "promo days" can follow me on Twitter, as I am working on a new update for the book.
The new update will include an additional game design for a popular type of game and, in addition, lessons in digital art from a professional artist (who also designed the cover of the book). Furthermore, new interviews will be available. For the new update I'll dig deeper into the templates that Construct 2 offers and how these can be applied and improved (incremental jumps for endless runners, anyone?).
If you have skimmed through the book and like it, please leave a review at its page on Amazon when you have the time. This enables me to improve the book and work on future updates. I already have at least four updates planned and plenty of developers lined up to participate.
Thanks & happy reading!
Merijn de Boer
P.S. After the period of exclusivity on Amazon I'd like to distribute the book via the Scirra Store. Contact with Scirra has already been made and they will review the book in the near future.