Thank you for playing, I'm glad you enjoyed it!
Apologies about the jump issue, that's definitely not intentional, the jump is supposed to be a lot smoother (and was during my testing!) - I believe it may be tied to the framerate of the game in some way, did you happen to be playing the game on a monitor with a high refresh rate by any chance?
EDIT: I've just uploaded a new version which has potentially fixed this issue - if you could try it out that would be awesome :)