ZeroBelow new element? like what?
Cool, works very smoothly and feels nice to play!!!
New elements could be things like:
Powerups: for example - Boost, could launch player at high speed.
Obstacles: have enemies that the player has to avoid.
Dissolving platforms: platforms that the player needs to avoid, because they will crumble.
I also think that the clouds should be behind the platforms. At the moment the platforms are hidden sometimes by the clouds which is a little confusing to gameplay.