Making a game like IcyTower or Doodle jump

InovaTech

hello loyal fellas.
I need help on making a floor to collide with my player only when my player stands on top of it, but not when jump over it.
I try my best to explain
yours sir johnes

-Timo-

we have a free doodle jump template at http://www.gsinvention.com/free-demos
worth checking out.

make a game attribute

in the player:
constrain game.attribute to self.position.Y-self.size.height/2

in the platform
if game.attribute >= self.position.Y+self.size.height/2
do
collide with player
hope this helps