How to create blueprint like programming in a HUD

I am creating a tank/robot control program and I would like to incorporate a blueprint-like control - but rather IN GAME rather than on the backend.

For example, if a robot tank needs to apply thrusters when bumpers are hit - I’d like to let the user program something like this in a blueprint like UI.

LEFT-BUMPER -o --------------------------> LEFT-THRUSTER

I am pretty sure that the programming portion would have to be done in a HUD UI - so I wonder if anyone knows if its possible to leverage the blueprint graphics capability from the unreal editor - but use that in the game as a component of a HUD.

Todd Lindstrom