That was quite short because I've tried to mix and do 2 challenges together, the One Room and 20x20x20 challenges, which means you have to do the whole map in a room, with 20 squares of editor on height, lengt and width (in fact I've used at the end only 3 rooms, one for dry area, another for water area and another for particles in the air and rollingball tricks for activating triggers)
So, I think it's already good having 15 minutes of an enjoyable gameplay on it for me!
And apologise for that stupid missing texture, I've changed at last the geometry and the editor decided to delete that
rookie mistake 
