Please Help!

How can I make a working health bar? please help by looking at my game and giving me feedback! the main part I want you to look at is inside the cave in

There are a couple of examples of health in the help page of Flowlab. Here are a few of such examples I found that may be close to what you are asking for.
Simple Health Bar
Customized Health Bar (Hearts)
Advanced Bars

Thank you! This was so helpful! and it is awesome that you gave me a choice of bars!