OH. MY. GOD.
Dude, I have no idea how you pulled this off, but you should be incredibly proud of yourself. Making a game this good, with visuals this impressive, entirely in plain JavaScript is a huge achievement. It's genuinely inspiring.
The graphics are fantastic, the music is amazing... honestly, just WOW.
The only thing I could point out is that the "Spin to Win" theme isn't used quite as strongly as it could have been. But honestly, that's a very minor issue because the overall experience is simply outstanding.
Seriously, congratulations once again. You absolutely deserve to be proud of this one!