Have you looked at the PlayMaker samples? If not, that is the best place to start.
Official playmaker samples? Can I just download those projects and use them in unity without having to do anything else?
The Throw Grenade example should point you in the right direction.
If you haven't already, you should watch the whole range of PlayMaker tutorials available here.
Before I click on the URL, does it include adding a main menu and 2D movement?