Need help. 
How do I simulate the key " b" (or another key ) when "the cursor \ touch is on " object " ?
What do you want to achieve with that?
You want typing? When cursor touch object it type “b”? Or is that “b” is jump button and you want to simulate it when cursor touch object? If your object have platformer character behavior, there is “controls” in platformer behavior in actions and you can choose to simulate different keys, example jump key.
Thanks Man!! 