Its hard to say for sure, as its super blurry, but I like the shape of the first hp gauge. Its recognizable, but also has a distinct look and feel to it

. You could also do pretty awesome stuff with it if you made a middle piece, and then just had it grow horizontaly as you got a higher max health (assuming you are putting that in, this is a metroidvania in my mind, so Im assuming you are, but Im not sure how based on reality that is. Man, I really wanna make a platformer now....)