Next version of Infinite PAX will also take engine state and lights into account.
When on runway and cleared to take off you must turn on strobe lights. Please check this video if you have any questions Landing Lights & Strobes
Currently in the app if you cross runways during taxi the music/announcement stops - this will be fixed as now turning on the strobes will be the stop point for the sounds.
Also to complete a flight you will need to turn the engines off after parking. At the moment if you stop during taxi to gate that stopped the music which isnt great.