Thank you so much!
Aside from the very welcome positive feedback, I am also most grateful for your list of possible improvements! Would you mind telling me if you felt that the entire screen felt cramped in your experience, or the instruction graph specifically? I know that for larger graphs panning and zooming can be a pain, so I'm sure its possible to come up with a better solution for that. I will look into making the textures more detailed, all of them were created using the blender node graph and then baked out, but I imagine that a more hands on approach (and some additional time) would give them some extra appeal. Unfortunately (or perhaps fortunately) the missing music/sound effects were not a bug, I simply ran out of time in adding them and I was worried that with my complete lack of experience in that area, bad music and annoying sound effects might do more harm than good.