Fire breath is an awesome ability on paper, but once I unlocked it, It seems to be really lackluster for some reason.

1. Fire breath requires you to have all of your energy recharged, which makes it really tedious to use. I like to fly around in my jetpack and sword slicing robots, so I never have a chance to fully use fire breath.

2. Using fire breath on Spidertron-6000 works half of the time, due to the fact that the bombs can knock you over and make you waste all your energy.

I'd suggest that Fire breath should be able to be used anytime, even when your energy's not full. So maybe pressing F could toggle it on and off?