Thank you so much for the kind words and I'm glad you enioyed this experience so much!
- I like the music very much myself, so credit again to the Pixabay artists who made it.
- The health circle was an idea I had to avoid health bars not fitting with the whole visual vibe ^^
- An exponential curve would definitely help and fit nicely with the clear incremental theme. But there wasn't enough time for me to fine tune the balance to that degree. I'm happy that I at least managed to make upgrades feel good, those had a lot of iterations...
- The seriousness of this game only reaches its full extent once your doctor diagnoses you with carpal tunnel syndrome for playing too much ;)