Behind the scenes:
The idea was SO persistent (moreover, I do not like horror). This game was possible, BECAUSE it was short GameJam, game like this VERY unlikely be my main project).
This was my 1st GameJam (although I have learnt Unity 11 months) and I had a job during weekend (Fr-Sun), so I could work on the game only 16 h (instead of 25-30 h) and on the end was EXHAUSTED (late nights and early mornings took a toll).
Still I am happy that participated and have no regret about chickening out.