I wish programs included stuff like this in their demo modes. Beeps with keypresses, animations, and the like.

Back when there were trade shows this would have been great on the show floor (fun to look at and give the salesperson more time to talk). Beeps on keypresses, noises while computing, and of course cool graphics like this.

That stuff would be super annoying when actually using the software for real. Perhaps it could be enabled in the free version and suppressed when you bought the license.