A Vegas-themed fever dream, and a pitch-black mockery of casinos' predatory nature.
Its by no means subtle in its depiction of the casino as a form of Hell on Earth, but said lack of subtlety works strongly to its advantage.
The jackpot winner dying right then and there, his corpse getting unceremoniously dumped into some vat of God-knows-what, the vat serving quasi-literal shit to a buffet-goer, the eyeball-as-roulette-ball openly cheating for the house - all of it works to create a fine blend of horror and humour, both pitch-black.
The ending shot is worth some praise as well - it feels outright desolate, like witnessing the aftermath of a nuclear strike.