Particle efect

Hi. I made a mini game were the player has control over a flamethrower.

I made the fire particles in a very messy way: each one is an animated movie clip.

Of course this consumes a lot of memory and the game may become slow some times.

any suggestion?

the controls are w,a,d, space and the mouse. don´t mind in game text as it is in portuguese.

the game is hosted at :

(copy url to the adress bar if the link doestn work)