Working with labels in cs4

Hi everyone,
I was wondering if somebody can help me. I am working on a game and would like to put code for different levels on the same timeline layer, mark the frames with labels(level1, level2…) and add different action script to it. Can this be done, and are there some limits. It is a small tetris like game, and each code would be mainly adding children to a stage, from an array and checking for a collision with objects added on a different layer on the same frame as the label. Also it would change score and so on. I just started, and I wanted to ask if somebody already had some problems with this way of development.

Thank you in advance