The Cycle of Life surely fits the theme and is very underrated motive (I think). I was positively surprised and I like how it was made. The difference between what is underground and what is overground works well and makes it easier to find different materials. I also liked how roots can grow over the ground layer.
I think small change with pacing and speed how fast your plant grows would be nice and I know that plants grow VERY slow but maybe adding larger deposits of minerals and water or gaining water overground would help a lot.
sorry it took so long, I was pretty busy kek