Hey man, I'll be using this health bar in my FOSS engine, hope it's alright.
It would be nice if you could use some sort of explicit license to avoid any misunderstanding about the intended use of your work.
Maybe the WTFPL would suite your current needs: https://en.wikipedia.org/wiki/WTFPL
Anyway, you can check my engine at: https://notabug.org/TooOld2Rock-nRoll/ArcadeFighterDemo