Button mashing likely could have been fixed with some sort of mana system. or by using the same spell over and over you cast it slower or something, causing you to stop using it as much, but even without those challenges the game is still pretty difficult.
we in the team had loads of ideas for things we wanted to add into the game, but due to a variety of reasons (such as me having my wisdom teeth pulled during the jam). we had to limit ourselves into getting the game basic and working, and had to leave out some of the more time consuming features like better bosses, and more spells, and sound effects/background music.