Thanks, Dan! Yeah, I made some last-minute balance changes to the boss and I may have overdone it. I was worried about it being a pretty unfair fight - you're kind of just stuck tanking the slaps because I didn't add enough windup frames and the player character is too slow for you to react. But there's also some RNG to his move choices, so if he doesn't slap much, you will just annihilate him. Last thing was I forgot to make the slime meter persist between levels, so as it stands, you can pretty much just tank the game :P
Thanks for playing and for the feedback!