Thanks for valuable feedback!
Most probably you faced a bug when some enemy leaves the arena and the game gets stuck. There are no wave restrictions.
For a game jam we wanted to have high score only, due to lack of time. But we are planning to add progression aspect to the game.
We agree that some abilities not that obvious as we wanted them to be. Basically fireball grows from 1 to the dice max value and throws automatically. And of course it's hard to track abilities on the indicator due to intense game loop. Already working on the solution :)
Thanks for playing, glad you had fun!