I asked Kalado if I could work on it and here is his reply
Hello CT, da'Bomb
As you have seen I tried to make some improvements to the sandtrack, but
I haven't have time to work anymore on this. Everything I made is under
the same license as the one of the original track, so of course you can
reuse my artworks. I wish you good luck to improve this nice track.
I uploaded his most recent version, with a few minor changes by me.
Some people are like slinkies... not really good for anything, but you still can't help smiling when you shove them down the stairs.