Facing problems in Simulation, Try Mode

Hi,

I am Sushant and I work as a e-learning designer. Currently I am working in simulation for my project in which I am facing some technical  problems which I want to ask .

Example - 

In Try  Mode,

My project says to 'click right click of the mouse to get drop down menu box' 

I want the users to  do exactly like this. But while running the try mode by default user has to click left button of the mouse to go ahead which I don't want.

And

If I have to show user to click function keys or some short-cut keys how will I show them.

So I want you to suggest me OR to give some alternate idea for my project.