My Life in a Nutshell

I went over this piece once a teacher I had (on counterpoint) told me I should notate the different tempi for each instrument. What do you think? The world of polyrhythm-polytempi is wide. This is a canon in prolatio where every line is the same at different ratios.

I do this sort of thing from time to time, but I didn't know that there was a proper name for it. It's a good way to generate new material in a very economic way. I'm not sure what you mean by different tempo for each instrument. The way you've written it is clear and effectively sounds that way as is. The overall mood is very calming and contemplative, which I liked a lot.