How to create a trigger in a Storylone course which also works with PC keyboard controls

Hi all,

I am creating a Gamified Course using Storyline 3. By default, if users are accessing the course on a computer then they can control the triggers only by using the mouse. But what I want is that in the game they should also be able to use some specific keys to control the related triggers. In a specific gamified course which I created I want the arrow keys to act as game controls when the user access it in browser of a computer. How can we make that happen?

Thanks in advance