First of all, this game was actually quite fun to play, at first. The main issue I ran into was the over spawning of enemies, making progression both difficult and annoying.
While some level of fun comes from difficult games, there still has to be a learning curve, I would recommend spawning a small amount of enemies at first, and also when introducing enemies *only spawn one or two of that enemy alone to help the player learn how to fight, and what attacks the new enemy has*.
Furthermore; ensure the player has a comfortable amount of movement space, to stop enemy crowding
The music was quite good, but it quickly became annoying when the music halted playing or cut out, I recommend either smoothly transitioning from a battle mix to a calm mix, OR slowly fading the music out when fights have finished.
All the luck with W.O.H in the future!
-Pizza9