Hello, I’m working on a fan game and I want to create a bar system similar to the game “Battlestadium D.O.N” where the bar grows as it gains spheres when hitting opponents.
→ Battle Stadium D.O.N (Dragon Ball, One Piece, Naruto) - All Characters [PS2] - YouTube
As this bar grows he would have levels from 1 to 3 equal to ps all star with special attacks and gaining a victory point.
It’s Energy Actually 
I would like to know if this is all possible, if so, what do I have and how to do it in UE4?