I like card battlers and it was a cool concept. Being able to assign the numbers to the cards was a great way to add some randomness to them. I also really enjoyed the music, it fit the casino vibe. Opening doors or running into walls really hurt my eyes though so I'd just close my eyes before moving into doors. There'd be a bright flash when you walk into something. I should also comment that it didn't work in Firefox for me but it did in Edge.