remarkably, i got most of the wheel's premium items already. it's the only luck I've experienced in the game, as I've never won at the dog track nor gotten a thing of value from Homer Buddha. i refuse to waste donuts on a gamble now.
but as far as the legality goes, you've purchased a chance to spin and that's what you got. a spin. no likelihood of winning is implied for any object let alone completely obtaining all items offered.
i grew up at the jersey shore (seaside heights) which has literally dozens of carnival/midway type prize stands with wheels like this, and you get the feeling they are all rigged. but if you don't like it then avoid games of chance that require money to play.
nothing about this game has ever been presented as "fair".