It's a proper (puzzle)platformer that lacks all originality. The mechanics have been done to death and in this game it is done in an okay way. The jumping felt okay, though some times there was sudden momentum from just trying to hop off the edge. Not perfect.
Jokes or story weren't there, but I think I saw something that was supposed to be an attempt at them.
There is no music, sounds are bare, and the graphics are bland.
Level-design was pretty good.
Now here's what made me not beat it: the time limit (and becoming bored). I'm not saying I was too slow, because I wasn't. No, this is because the timer is bugged. If you're going to make a timed game, in which the timer is necessary for progression, don't fuck that up. Whenever I died, the timer acted as if the time I had spent in my dead life was still taken off. The bug can be circumvented by retrying ("R") a second time, actually resetting the timer, but I found that one out when I was at level 46...
Short version: waste of time.