Two things strike me as kind of unbelievable about this game. The first is that this was somehow made on the same console as the original Super Mario Bros, a game which feels incredibly creaky and antiquated nowadays, whilst Super Mario Bros 3 both still controls well now and isn't that far off aesthetically from a product I'd be fine with seeing released nowadays.

The second is how, despite countless games since SMB3 imitating it and reusing its ideas, even now you can still feel this game just oozing imagination. There are close to no moments spent in the game that aren't either introducing a new idea or developing a previous one in an interesting way, and whilst not all of those ideas are necessarily good even the duds are largely excusable because you'll be only moments away from something far better.