Wandering roots - I like how the different sounds weave in and out of each other building to the climax.
The gardener - Very moody harmony, like a 60s modal jazz piece. I like how the simple melody contrasts with the harmony.
Symphonia - Very dreamy, like a music box. Love the transitions in and out of the bass section.
Maintenance system - I like the contrast of the floaty-ness of the synths and melody and the pulsing of the clicks and bass, like ambient humming with clanking machinery sounds.
Pat's song - Strong theme to end on. Would have liked a cathartic call back or climax to conclude everything.
Great overall, made me think of the ambient stuff in rain world. I like the machinery taken over by nature aesthetic and I think you captured it really well.