Did anyone else, think, there was a secret here?

These levels look pretty much identical. I don't understand why people like them so much if there near enough the same, every time.

Is anyone else getting this strange bug, where if you open the kart design menu then exit to the main one, you keep getting new kart items for nothing?

These ants spawn out of thin air! Does this prove that ants will eventually over run the mushroom kingdom, & the entire mario universe?

Who else wish Nintendo did a bit more with the 3d world format. For example they could've added hidden passages to secret worlds/ levels. They even could've placed hidden blocks containing 1-ups/ m...