A decorative calculator would have missed the point. In Fit and Proper, return is part of the evidence, so the return programs make the player read, time, route, sample, and interpret what the device actually pays.
PAR Paytable Drop asks the player to classify a live figure and file it through a moving amber window. Return Pinball 2000 uses a real 120 Hz table simulation and three sample targets. Other filings can produce bowling, darts, rhythm, tile, artillery, or stranger diagnostic programs.
The mechanics change, but the contract stays clear: complete the return program, receive the return clue, and bring it to DOCKET with the machine or software clue.
Building these programs kept an earlier design test intact: if an application exists on the desktop, it should do meaningful work rather than merely sell the period.