Thanks for playing! If you managed to get far on Hard you're probably doing it right. Circle strafing is the best strategy right now. This is one of my main concerns, I plan on spicing things up with smarter, flanking enemies and new rooms that discourage circle strafing with environmental hazards and platforming. I also thought about hand crafting each room and manually placing the enemies.
I do plan on toning down the noise, maybe simplify all the explosions and remove smoke.