my games help

hello first of all, I am coming for a while with the idea of ​​making a zombie game and a game like 2d counter-strike but Painball can be achieved with a game like counter blender ¿?

nesesito if I could explain how to make a health bar of my character?

and how to do that when the zombie diminusca rascuñies me my life ¿?

Health Bar -

It’s for an older version of Blender but it should all still apply. I followed it pretty closely to make my health bar.