Now this is a piece based on a motif. Note that I categorize this slightly differently than motive which I feel is a more deliberate theme that doesn't necessarily have to recur so often, or doesn't require a strict pattern. Anyway, this melody is short enough to qualify as a motif and it's certainly recurring throughout. Moving on, even if you categorize this piece as experimental, it can also be a study due to how organized, focused it is. I'm trying to pick out the new parts for fun.
At around 1:55, the tension and release is well done. I feel this perhaps qualifies as one of the new part you worked on (let me know if I'm right? lol). You then expand on that idea at around 2:36. This is really very good.
I think that at around 0:38 seconds in through 0:50 seconds, this part just feels slightly too repetitive. But then you follow it up with some really great writing immediately afterwards. I'm not sure if I'm hearing the old Peter transition to the new Peter here.
2:22 through 2:35 is actually almost the same passage as 0:38 to 0:50, but it's done in a much more interesting way...again, new Peter?
But in general, while most of the piece is actually repetitive, it's done in a way that is enjoyable to listen to, and I think that people can learn from this (sorta like a motif study perhaps).
One thing to note is that the score needs to be landscape or tabloid when you are doing orchestral works, just so that its easier to follow along. It should not read like a piano score.