maybe too normal a sense of 'progression'.
I really love your music. They all loop perfectly and I find that when I play them through Winamp, it becomes a sad affair to turn them off.
I always make sure to listen to any piece I'm considering for an in-game loop for at least half an hour - if I don't enjoy it for that long, I consider it too short-lived to accompany a game.
When listening to your pieces though, time stretches and snaps... and I lose track of time.
Enough of the general compliments, down to specifics. Relatively speaking.
The sorta reversed cymbal noise you have going on reminds me of some big dark room full of gas pipes and some of the later noise samples sound (to me) like gas escaping from those pipes.
It could be a dark, sinister place - and it is initially. But the piano - well measured and each note well chosen - lifts the mood slightly, giving it all a dreamlike quality.
My one complaint is that the whole thing is more like a normal 'piece of music' than your usual affairs and so - whilst we can still enjoy it as an endless loop - it becomes more 'obvious' that it has a start/end and where those are. Both because of the slight silence with the bouncy notes bringing us in/out at the start/end and also because of the introduction of the extra instruments, after which they continue, until just before the end.
I hope you understand what I mean. In some other pieces, you have extra layers coming, leaving, so there's no one place where the tune is 'denser', just places where it's 'different'. This actually feels like it has a normal sense of 'building' and 'progression'.
The sorta reverse-echoey effect you have with the piano sounds great and really softens it all up.
In conclusion - yet another masterpiece from you, but maybe too normal a sense of 'progression'.