well it definitely needs work. there isn't enough water around so whenever I try to go on the offensive I die because it takes too long to get back to water.
Some of the fires didn't work to light up miz and there didn't seem to be a final objective I could figure out other than kill all of the enemies before they kill you.
One thing that might have helped is if there was a compass or indicator that showed where the closest water was while you were on fire.
The concept of the mouse as attack and keyboard as defense was neat it just needs to be fleshed out.