Awesome game for One Button!
This is a pretty simple yet fun game.
One of the problems would be monsters dealing big damage at the beginning. Another problem would be how the Shrine gets progressively expensive. Divine Edge appearing less frequently is also a problem, especially at late games. Lastly would be the randomness, which adds challenge to the game but also make it hard to play as the randomness may cause Potions, Divine Edge and Shrines to appear least frequently.(Considering how they are important at late games.)
But overall, this is a pretty decent game.