Ok, I failed my click check. I meant to vote 'Other', not 'No, it affects only touching the ground only'.
I would probably rule that the movement penalties (slowing down, need for balance checks, & falling prone) apply to someone touching the ice. Sculpt spell should let you have the path climb walls instead of staying on the ground.
At the same time, I'd probably have any creature in the 3d space take the cold damage.