Thank you for playing! Yes the character does move pretty quickly, that was intentional, it's meant to be a bit of a step outside of the usual platformer comfort zone in terms of movement. The first 3 levels are pretty easy but the 4th and 5th levels are much more challenging, the 5th level being the hardest. It's definitely a game you need to really practice with to get good at.
Tell your wife to leave a review when she plays it!