That's a pretty interesting entry!
FIRST THING: too many dialogs. I mean, it's a story based game so yes, but it could have been quicker and more interactive maybe, I don't like spending my first 5 minutes reading texts. The game is having a nice storyline, with some contextual music and sounds that are ok: some of them (e.g. the race's one) aren't looping seamlessly. You should also have added sounds when using the Z key to interact, player feedback is important for any action.
I like the idea of implementing several mini games in a game, but sometimes they're having some little bad points (e.g. the jump of the platformer game, you can stay stuck to the sides of the platforms). It's hard but to me, you need to make sure every single added game is having the same quality level as the rest. Overall, those mini games are pretty simple and I think they could have been better. To me, it was a very ambitious project for a 7 days game jam, leading to some missing polishing and approximate controls. The bullet hell and the air fighter ones are the worst, I didn't enjoy playing them: way too unbalanced.
Art is cool, consistent, even if I'm not always fond of the UI elements of the arcade games. It's still great, especially the main scene of the game (the casino).
I can see that there is a lot of work done here. Oh and also, game mechanics aren't lying, you're just cheating at games to win them. I'm not sure about the way the theme has been handled.
I still had fun trying the game, good luck for the voting!