Oh, thank you all, and delighted that my play arouses your curiosity. However, it is only a modest exercise in style, which I am far from daring to bring closer to the immense statue of the post-romantic god that Mahler is in my eyes (and for whom I have condemned myself since my childhood).
His 10th is a symphony ghost. Only the adagio is original. The scherzo, I think, is also quite complete. But the other movements are more fragmentary (but we know that they are still quite successful for some passages). All this deserves to be checked, (I'll see what HL de la Grange says).
Dying at 50 and letting us glimpse these worlds that have been open to his genius since at least the 9th or the song of the earth. 50 years may seem quite old to you, you young people, but I, who am 52, can tell you that we do not want to give up life at all and that we do not yet feel a foot in the grave, even if the health glitches are starting to annoy you.
So, out of pity, don't say the obvious. It looks a bit like Malher, it's quite right, like an allusion, like a wink, but it's a hobby on my part, as we play with his electric, miniature, simplistic train, at the opposite of the demiurge world builder who is the great Gustav. I also believe that it is useless to make this precision because your ears know it. We can think of this or that composer, but everything remains in its place.
Unfortunately, I can't give you an orchestral score since it doesn't exist. I usually write on 3 lines (or even sometimes 4) and then I orchestrate directly afterwards. I sometimes annotate the manuscript, for some orchestration ideas but quite often I already have the idea in mind of the desired mixtures.
Here, the overall trajectory was therefore a brutal attack, like blindness, then its slow and progressive 'hemorrhagic' consequences, before letting the echo of a tonal world win, open to an already distant past. I am immersed in the reading of Thomas Mann's huge book, which is an absolute jewel of literature. No doubt, this too has contributed to some shades of what I have in mind at the moment...
EDIT. At the rereading of this answer I really appear very pedantic. A thousand a thousand excuses. And again, thank you very much for listening and comments.