Thanks for playing, for the kind words, and for all the feedback!
The thing with the activities, that maybe I should've conveyed better, is that they're not actually "mandatory", in a way that you can kind of skip them if you want to, and beat your heart at the rate you want. However, by doing that you earn very few tokens, which may interrupt your progress. There is actually a use for that, though: Lower BPM costs less durability, so you can try to preserve your heart until you get to the shop instead of getting lots of tokens from the activities.
That being said, I think I didn't make that clear enough, maybe I should've done that in the tutorial. Nightmares, Gym activities, and some of more difficult activities like fishing or surviving an accident can be super good for tokens, but they do devastate your heart's durability if you're not careful, because they usually require fast BPM rates.
Again, thanks for all the feedback, I really appreciate it