One big limitation in Super Mario Maker is that objects too far horizontally offscreen are not simulated and may "de-spawn". Here's a more detailed description

One big limitation in Super Mario Maker is that objects too far horizontally offscreen are not simulated and may "de-spawn". Here's a more detailed description of the rules: https://www.reddit.com/r/MarioMaker/comments/3lcrqb/super_mario_maker_science_spawning_despawning_and/ https://www.reddit.com/r/MarioMaker/comments/3lcrqb/super_ma... This means you have to include Mario's position in your design if the device is larger than the horizontal simulation area. Just chaining together NAND gates isn't necessarily enough.