great idee, some problems though
The mouse/ghost got almost uncontrollable after some deaths if you started the stage right away. However if I waited sometime before restarting the stage it was ok again. I'm not that expert in Actionscript but I assume it might be a garbage collection problem, e.g. you eventually add a listener object like Mouse.addListener(Ghost), but you don't remove it with Mouse.removeListener(Ghost) before deleting the Ghost-object or reinstantiating it's pointer; this ultimately leads the Actionscript execution to send mouse events to unused objects, until the garbage collector realizes that those are no use anymore and removes the mouse listener of it.
The story seemed quite random, but I liked it (I dislike games with no story). But I found it a pity that there was no real conclusion at all (even if it's would have been sth very simple).
The drawing was a little bit childish, but it fitted the game quite well.
The music was ok at first, but got annoying the more I played, because it seemed to get more and more nervous (and did not stopped when I died). I was a little bit disappointed that there was no option to disable sound effects and music separately.