The game is cool, I?ve played few games like this (starting form "Doodle jump") and the graphics are nice too, but here is a very critical problem with the game (and I think I know where the problem is coming from): There is a problem with the jump. When you touch a platform, the character jumps suddenly to another Y position, wich is very strangre for the player.
I think this is hapenning because you have different animations for the player (standing up & Jumping), but they have the origin point setted up in different positions (look for it on the sprite?s animation window).
Fix that and the game will be much better.