The time progression slide is neat, I'll have to read Wells' The Time Machine some day.
It was my understanding that you were making a game, not a training simulator. It has to be fun. Also, you NEED good sound design. ESPECIALLY music. Don't tack it on as an afterthought.
If this is actually meant to be fun to play, with achievable goals, a satisfying narrative, and a clear end, I'm looking forward to purchasing it.