I was looking forward to playing this one after seeing it on the progress channel on the discord server! And I can gladly say that I completed the whole thing 8) (although maybe cheating a bit, I don't know if we were supposed to be cycling between deleting some rails and then deleting some other to make everything fit... lol
In any case, I enjoyed a lot and the whole thing works perfectly with the theme!
I do have to say though that the game crashed three times on me (once after plant+plankton>soil level, another one after the plankton > sea + life level and also after finishing the last one, in case you might wanna check it out), but thanks to the game always saving the progress, it wasn't really a big inconvenience.
So overall very nice job ^^