Thanks for playing! The HP bar is right under the player, and it decreases as they take damage. However, it sounds like it could be more noticeable. :)
*Checks the game again* OH THERE IT IS WOW I'M BLIND. That said I think maybe centering it makes it harder to realize it's going down when you get hit and thus what it is? Like surely I noticed that the first time playing but just didn't process it. Or the game just full on glitched for me the first time because my computer is a toaster lol
Glad you found it! :D But yes, I can see how it can be less noticeable that it's going down while centered since you don't have as much of a point of reference with a bar that small.
One thing I wish I had time to have improved is the indication that the HP went to 1 when transformed. Right now, it reflects as a single pixel-wide health bar, but it's not really visible with the flame effects and attacks everywhere, so it might seem like the health bar disappears. I also didn't want to play "Zelda low hearts" sound when transformed, because that would be annoying, though possibily appropriate for the non-transformed mode. :)