Now this is a very good take on the limitation!
Health as Tools - and each different heart of your health bar has their own ATK and Range! A very neat idea, and the visuals for the game are also pretty neat too. Maybe could be toned down to make it a tad smoother.
Are the levels randomly generated? I noticed a few times I'd open a chest, and when walking over the heart to collect it I'd discover the chest was hiding the stairs, making me go forward when I wasn't ready yet. A minor hiccup in the generation, just thought I'd point it out.
Lovely art, good gameplay idea! It's a solid entry overall.