Wow you had the same idea than me. I would prefer that you can put the go back point manually instead of timming it, but for the rest it was pretty nice.
Also I would be very happy if you could rate my game ;)
I like the idea of the ages depending on your position. Also the graffics and sound effects were awesome and very good implemented. I am impressed you made it in 7 days. Keep it up!
Thanks for your comment, I also think that the tutorial wasn't that clear. For next time I will try to make an interactive tutorial, like this I could feet more information in less space.