Totally love that Idea, Blink.
I think it's the best one so far, but I would really like it if we would use the same location for each level; the house (and garden?) of the character, in different time periods. I'd love to see how the thing changes from a normal house (present) to a futuristic villa with a big garage (in the past) and back into an old, worn down hut (past).

What I'm missing is more concrete puzzles, but I do realize you said time was short for you.