The game is very decent. The sound and music are good, and the concept is nice.
I personally found the slow-motion mechanic rather frustrating an unecessary. It doesn't grant you any real benefits (like jumping higher) and it purely used for player convenience, when in reality you could simply make the game have a medium pace, as opposed to extremely slow or extremely fast. Pressing the space button to change the speed feels like a chore rather then a strategy.
The jumping was also a little too low for the obstacles in my opinion, and could be either a bit higher or have the obstacles be a bit smaller.
Great job overall!