Thanks for the feedback!
The end goal was to make a game where the generated 'video' is interesting to watch, but it also fun (and maybe exciting?) to play.
It is a challenge to make the cursor movement smooth. I tried to make the fast option for long distances, maybe I could increase the hold threshold.
If you activate the 'advanced' mode on the emulator site, you could increase the timeout with '-setup-time 1000' in the args. (You can start the simulation anytime by holding A2/X button)
I'll check the command line problem, but I think it could be a rivemu version thing.