You nailed the casino vibe. The dealer got some good shit. Loved the upgrades he got because there is a 'but' with every buff listed, really makes you think what you want. Difficulty is really well balanced. I don't see many people talking about how good the combat is. Boss attacks feel fair. The dash i-frame are awesome.
One thing I found on my second playthrough, you can kinda cheese the second boss if you stay where you are spawned in his arena. Real strong entry.