Sorry for not continuing the comment the other day, I had it all written out and then my computer decided to crash and I lost it all - by that point I was once again too tired to write more.
Actually feet were recorded running on the spot. I didn't have any treadmill nor the big greenscreen to record the whole run phase on it so the only way I could do it better would be to suspend the actor so he could easly move his legs in the air. Am I right?
Running has much higher back leg lifts, and the pause between steps is drastically decreased - taking them into account, you should try re-recording it

But yeah, having them suspended in the air would work too, but may have a very disconnected feel to it (which may or may not be what you want). At the moment, it looks like the guy's playing hopscotch, especially with the little jump at the end of it!
Dialogs were as you pointed little too friendly because I tried to achieve some kind of impression of unreality, of the world lost back in time.
I wasn't complaining about the dialogue, don't worry

I think it's rather nice, and reminds me a lot of
Amélie with the combination of innocent dialogue and fairly adult themes.
I had a problem trying to figure out what the man at the table meant when he said: "So good it doesn't turn cranks of us old." Care to explain?
There was also a problem at the beginning with Margaret on the roof. In the shot he notices Margaret for the first time, she is turned to the left, then a few shots later when she turns to smile at him she is turned to the right.
Other than them I found it to be a very, very well made short film! I loved the surreal approach you went with for the whole thing, and I'm not sure whether it's good or not that I was completely confused by the second half of it (post-dream).
Very well done, I'll look forward to seeing more from you!