Hi!
Thank you for the awesome feedback, much appreciated!
The game is endless as of now (even though generally the player will simply be overwhelmed hehe... maybe storymode potential in the future? WHO KNOWS)
As for the heal, the full heal price is based on missing health, while the 3 health is static. The idea is that sometimes you have to choose between healing fully or just getting a little bit of health back, but sadly I didn't manage to balance it just right :D