I give this a 10/10 for difficulty. Not having played much of it, I can't rate much else, but I can say I can't get past any of the 5 or 6 pathways leading out from the hub. This is really, really hard, both from precise jumps and lack of checkpoints - the latter of which is not a good thing.
Also the easy mode doesn't seem any different. What did you do, remove a spike somewhere?
...
Just kidding. Seriously though, I think you accidentally put the same level twice in the zip file.