NOoo! I wanted 500 so bad! Like a boss.PNG
Since you asked for balance, corner camping is a little overpowered. This is partly because the fireball can go as far as you want I think. I do like the rate you get fireballs, but using them to blow up the guys in the opposite corner is strong and the game doesn't punish you much for staying in one spot or give you incentive to move (the earlier mentioned dash is a cool idea). I did have a lot of fun corner camping though haha, never seen a boss cheese a player. Thankfully for them I'm not one of those healing bosses.
PS: fireball sound is so cute.