I like your style. A hero made of firefighting foam is utterly fantastic and lent itself well to the theme. I also liked your graphics, animation and colour scheme.
Movement and shooting could use some tweaking. I died a few times because I didn't realize that ammo/health was so limited. It was hard to distinguish whether I had 3/4 hp and 1/2 hp. I had fun initially but got frustrated with the gameplay after a few levels.