I don't think I can work on two projects at the same time, NS. Though I do like the idea of a backup game, in the (highly likely) event that I muck up the main project. So I guess I'll just start two projects and then leave one on hold while I work on the main one...
Thanks for the advice guys
Oh, and just so you guys know... The game mechanic is for a slow-paced puzzle-oriented game. The plot, on the other hand, will only work for a traditional rpg/ dungeon crawler-ish type of game.