I much prefer Spacechem. Opus Magnum has the control separated from the machine, so it’s easy to optimise all the timings. With Spacechem, you have to play with

I much prefer Spacechem. Opus Magnum has the control separated from the machine, so it’s easy to optimise all the timings. With Spacechem, you have to play with having the red Waldo control the blue, because the blue already has a command at that point. I guess it’s like Harvard vs. Von Neumann. Harvard is more practical, but Von Neumann allows more fun hacks.