If you really want the wind up, which to be fair is not that of a bad idea, I would suggest doing a bit of sliding when winding up, so that the it doesn't feel like the game just stopped. (Taking something from Mario) Landing I would say is a bit unnecessary, seems punishing the player for jumping, which is not ideal. Unless you are dropping from a great height or course.
I remembered someone did mentioned, probably GMTK, that pausing the game for a few frame is a way to "feelingly" punish the player for doing something wrong, and I felt a bit of this especially during the landing animation.