Info as far as i know:
The game was a temporal esclusive for backers of the "Enciclopedia Homebrew Vol. 2" crowdfunding campaign.
Last saturday were delivered the copies to the backers who attended the Amstrad Eterno event. This week will ship the rest of copies.
The game will be available for free download somewhen in this week or next week.
There will be another physical release in RetroMadrid 2017 at the end of april. I do not know if it will be posible to order copies directly from their website, but i am gessing it will be possible somewhen in the future.