No changes would be made to the game code, so the Emu would need to know what to do. So I mapped out the desired states. We leave this state when the title page is loaded and go to state 1. Since we are still not ready for input, we wait until the title picture is displayed, then go to state 2. The display is detected by watching the VDP display enable bit.
Controls remain disabled.
However, if any credits are entered, the start button is enabled and mapped to the Fire button for the game. In this state, the controls are all randomly toggled in order to have the machine 'play' the game. The real controls are still disabled. Credits survive restarts. A timer counts in this mode, and if it expires, the emulator also restarts.