You're gonna be bothered by how cool I am.

It never occurred to me to complain about those things resembling "hamster wheels" (one's more like a "hamster ball"). I do think they're incredibly similar--although not exactly the same, as you pointed out--but I also don't think either is a reason to criticize the film. I though both were very cool and fun, especially the dueling that continued on the water wheel after it started rolling!