My first impression is that this may be a game similar to bocce ball, perhaps played on a table. I don't know why the cubes could possibly have beads inside them, except to make an interesting noise while they're turned/slid/rolled.
I'm guessing that each player (up to 4 players) would have a pair of cubes of matching color, and the black cube would be the target cube. Players may take turns trying to "shoot" their cubes to stop closest to the black cube, with points being awarded after every round to the person with closest cube. Maybe the cubes don't count if the white side doesn't land facing up.
If that's not what it's really made for, you could probably have fun playing it anyway!