Why not hitTest?

1) Are stairs possible with hitTest?
2) I can draw stuff on the map MC and I don't have to worry about Doodle landing on it. For example, at the end of the first level it says Level 2 (written with the paintbrush).
3) Really thin objects are skipped over!

Even if you have solutions to all 3 (maybe more I don't know about), I've written 750+ lines based on the system I have now, so converting is too much work at this point.

No help with the math? ;(