A game I was not aware of is Kaettekita Mario Bros. Basically, it's Mario Bros. with revamped graphics and controls (you can change direction mid-air), and... ads. It has also been distributed in Europe, without any ad, as Mario Bros Classic. I was wondering if if will play fast or normal speed, as it really is the superior version. @nesito to show it?
the Mario Bros. Classic (Europe).nes rom runs faster but is still playable and makes the game more frantic
the original Kaettekita Mario Bros FDS disk also works and there is even a english translation which also works