I just played this 100% Spanish game demo and I could say the graphics, sound and music are excellent. It appears that the final release is aimed to be commercial. The event programming and cutscenes show effort and mastery.

 The menu can benefit for some adjustments on the font size. Some words are way too long and the software is forced to minimize them, giving it an odd look. The demo doesn't have a clear direction. I walked through a few areas, collected items and that was it. There was no indication as to where to go next, the two areas I explored lead to nowhere. Couldn't get a grasp of what the game is about, there were no enemies and a serious lack of reward for exploration.

 I felt as I was being thrown into an art galley instead of a videogame. A showcase of look at what I can do VS what can I bring. The files can be very confusing too, there is a Small Demo and the Semi demo. I would say, the game has something good going on as far as the art, sounds and music but a videogame demo is much more. 

A videogame demo  must present clearly not the entire story, but an idea of what's coming . I got the impression that the developer has no idea as to how the game is going to end an instead, is looking for feedback to see if he will continue with this project or no. 

Solutions to this problem.

1) No more demos or demos update. Erase the ones that have been published and focus on finishing your game before burnout sets in the team ends up throwing the towel or working on a 5+ year project that never and never will see the light of day.

2) Once the game is finished release a demo that clearly showcases what the game is about.