Thank you so much!! Wave 30 is a great score!
Unit decay felt necessary to require maintenance on the backline. It could be toned down a bit for frontline units. With fairies, I feel that if you don't have a good setup for summoning them they may feel a bit underpowered. Still they can be very strong if they are topped up with milk. I might come back later to tweak the balance of the units lol.
Thanks again for playing and for the feedback! :D