can�t open your example, i just have release 114 :)
Let me explain the situation:
i created a blank sprite called "hole" for example. I want the player to shoot over hole, but not to go through.
At the moment i solved it with "Player"->on collision with another object "hole(which is not solid, cause it shouldn�t reflect bullets ;-) )" and then "8 Direction movement reverse".
It doesn�t really work out fine. It�s a little bit like glue, the player sticks there pretty long and if i continue running against "hole", sometimes i can wander through!
Hope i could figure out, where the problem is! :)