Composer here. Thanks for the feedback. Slight correction: The mages do respond to where you're aiming, although their reaction time is a little slow so the projectiles may end up going in a direction completely different to where your cursor actually is. I do know what you mean though. It could definitely be improved.
"And the music was very good, very enjoyable." - As the man behind most of the OST for the game, I greatly appreciate this comment.