Based on the feedback I've added more visual indicators for the player taking damage. I've also added some unique mechanics to 3 of the kaiju to add more variety to the fights.

+ Cracks in the player's screen representing how much health they have left (75, 50, 25, 0) 

+ Electricity effect when hit with S3N7RY’s stun

+ S3N7RY's stun now roots the player in place for 1.75 seconds (arms are still free to punch and block)

+ Bile splat and windshield wiper animation when hit by Bilosaur's spit attack

+ Hypnotize effect when hit with Mothula's stare

+ Mothula's stare now reverses your movement inputs for 1 second