Floor 33 is the thirty-third level in Heavenly Tower.
Crazed Bird Cat spawns immediately, followed soon by Crazed Axe Cat. Crazed Gross Cats spawn frequently for a few minutes, but will eventually stop. Don't be fooled by its simplicity, this stage is much harder than the two before it.
Octopus Cat is almost mandatory, as it can block Crazed Gross's shockwaves while also weakening Crazed Bird Cat later on. Players must be cautious, however, as Octopus tends to die easily thanks to Crazed Axe. Hard hitting cats that are shockwave resistant like Anubis, Musashi, and Inferno Akira are great assets here, keep them behind Octopus and meatshield lines to break down the Crazed Axe and Crazed Bird over time.
The Crazed Gross Cats are the only consistent income source, and they will stop spawning after a while, so care must be paid to money. A Rich Cat may help this stage a good deal.