popping hearts was kinda weird because this game was looking so simple and silly until i popped a heart and it exploded in a lot of blood before another one spawned, that felt kinda weird (but tbh you don't need to change that, it's more my opinion). And as i wasn't listening the audio, i needed to tap at fixed intervals using only the heart itself as a guide to when to click, but the more i clicked right, the faster i needed to click, but it was getting faster slowly and sometimes trying to focus on the click pattern distracted me to the heart beating animation, and as i would need to click faster and faster, i was losing the streak several times lol.
Edit: i popped 2 hearts now, on the third one, sometimes the borders of the screen would go red, and i didn't understood why. Is this the defib mentioned?