Uh, I think it would be much simpler to just make a solid color square sprite, set its visibility to invisible and place it where you want the player to click on. re-size/re-shape it till it is covering the area you want clickable set a variable instance on it something like "click point" then just use the same object and place it in the spots you want clickable then change the properties of each click point so the variable is a different number for each point, then in the even sheet make an event like
1: On left mouse click "click point" (or whatever you name the square)=
2:click point is at 0 = whatever action you want.
3:click point is at 1 = whatever action you want.
so you pretty much have a set of subevents off that one event and it will check the instance variable and do something different even though it is the same sprite they are clicking on.
I can make a capx if you need an example.