You have a very similar vision for your casino that we did! The tom and kick drum intro get us into that gambling groove, then the horns bring in the Las Vegas lights and sparkle. The walking bass is very nicely composed and produced. I absolutely hear the Mario Party inspiration, in fact I picture Neon Heights from Mario Party 7 while listening to this!
Constructive feedback: I really love the B section most in this piece, I think because you lean into the jazziness of the melody and it feels a little more free. In the A section, the melody often seems to land on the downbeat frequently when I wonder if having it be a little more syncopated would help with the jazzy flow you are going for. I think the tom beat could also emphasize hitting the off-beats a little more too for similar reasons.
Overall, this is a well-composed piece that evokes a sense of gambling, but also highlights the glamor or being in a city where there are many casinos trying to entice people inside with lots of colorful lights. Great work and thank you for sharing!