Discovering everything felt short, but I had fun learning the spell combo's by memory whilst throwing Mallow at as many birds as possible. I could see potential with different scenarios and possbily some kind of story?
I see the main issue being the ballance with an abundance of ingredients after getting so many cats and capacity upgrades, giving more of an incentive to spam Echoes, Sovereign or Sparks. The Boss especially need a buff of some kind, I'm finding she goes down before she can even cast her first spell after the first encounter (also the music stopped playing after I beat her the 3rd time, which I assume was 'the end').
Some ideas I could think of for balancing could involve higher level spells costing more to cast, make homing spells more situational or add challenges that only allow for certain spells to be viable/ reduce ingredients that Mallow can collect.
I know you've likely heard a lot about this, but it seems like a fun game and I look forward to seeing how you progress with it.