This was pretty fun. The concept of that you need to let some hearts fall is a nice twist on the "Gather them all" minigame. If I were to change anything, I would make it easier to stay within the range and then make it a high score system so that I can play this for longer.
Viewing post in Saving Hearts jam comments
I am so happy that you found it fun.
Your feedback gave me an idea of adding different ranges for different condition, e.g. relaxing (maintain a low stable bpm), exercising (reach a high stable bpm), survival (stay within a range for as long as possible to get a high score), etc.
Thank you for playing my game and giving feedback.