Smiley Collapse is similar to Plumet, except for the fact that you have 3 lives in this, and there are "power-ups" that you can get to help you along your way.
Green Power-up: Activates "Ghost Platforms", which allows you to go through the platforms for a short period of time.
Blue Power-up: Activates "Slow Down", which slows down the speed that the platforms rise up for a short period of time, making it much easier.
Gold Power-up: +1 Multiplier, which pretty much helps your score go up faster. You can collect as many as you want of these to help you score fly like a rocket.
There is also the matter of platforms...
First, you have your normal platform, nothing happens, you just hit it and move on.
Next, you get to meet the ice platforms, which make you move faster.
Lastly, you encounter the sludge platforms, they slow you down big time, so get off quick!
I've also discovered that if you get to falling fast enough, you can go through a platform.
Have a enjoy!