Thanks for playing the game brimstone! :) I've really appreciate the feedback, and I'm glad you liked it! I'm working on updating the game with fixes to some of the concerns:
Water will hurt you over time, but you can kinda swim in it a little bit, allowing you to recover before dying.
I'll bring the camera back a bit and shooting monsters will only be allowed to shoot if on-screen.
Add a melee attack and a charge attack to the boss, and fix the ability to stun lock him.
Explosive barrels will have a much more sensible radius of damage. Instead of doing a set number of damage, damage will be reduced over distance, so you take much less damage the further you are, but can still die if standing next to an explosion. Also, cars will be explodable too. :)