Loved the game...
And though I do admit it was a fairly hard game, it was fun. I've read some other comments here about people saying its too hard... If the game is too hard for you, don't play it. Don't give it a low score because you cant beat it, THE WORLD DOES NOT REVOLVE AROUND YOU.
No, it's not impossible to duck, then jump, it requires good timing though. Like stated in the Author Comments, it's a reflex/action game, some people are slower than others, if you're one of those people, why would you give a great game, less than it deserves, just because it didn't live up to your standards or needs?
Anyway, back to the game itself, I loved it, it was challenging and required full attention, one thing that I noticed while playing though, is somtimes on the first stage, after you speed up to make the jump, the game sorta freezes after that, and nothing else happens. It just stays in an endless loop with nothing appearing.
Overall -
10/10 5/5