I like this idea. Put out a Mars Explorer and a Lunar Explorerer product. Let us explore in our dune buggies, or send out our Rovers. Make it a Sim, surface time vs. remaining oxygen. Keep track of orbital mechanics, must move within launch windows or be marooned forever. Link and Sync to real time NASA launches. As NASA lifts off, so does your simulator. There are already some nice launch simulators out there, this extends those to be complete mission simulators.