I considered showing the robot's path, however I think that would make it a bit too easy - and rob the game of the fun of tracing the path across the levels yourself using the mouse. This remind me of the GMTK balatro video, how previewing the outcome can sometimes spoil the fun of a puzzle.
I also quite enjoy the "set up and then watch it go" structure to the game, rather than the idea of pressing a button to make the robot take its next move. Perhaps I could give the speed slider a greater maximum for this purpose, or something like that. This is a tricky problem to design around, as you mentioned.
Anyway thanks for the in-depth feedback, I do appreciate it!