Quite a mesmerizing effect just sat and stared at the coins for a while. Is this a 3D engine or some clever trick with sprites?

I think I've seen this somewhere! There's an indie game, Raccoin, that looks very much like this website (coincidence?)

I didn't realize the single spinning coin was actually a loading animation.

Might make sense to add text indicating it is loading, or a loading bar. Without this, and considering the long load time I had, I imagine the bounce rate is gonna be quite high.