My friend Helgefan spent a lot of weekends building a level in Mario Maker which lets you input two numbers between 0 and 7 by breaking certain blocks. The rest of the level then automatically adds these two numbers in binary and then even converts the result to decimal for your viewing pleasure. 
It's pretty f***ing awesome, just look at this madness:
A video of the level can be found here:
https://youtu.be/rCTGXUNg2fE (no sound unfortunately)
A lot of things like item limits, despawning mechanics and of course space constraints had to be taken into account and it was not certain that it was even possible before he actually implemented it (7+7 is the highest which he could fit into these constraints).
He described how it works in a reddit post here (you can also find the level code there)
https://www.reddit.com/r/MarioMaker..._binary_adding_machine_with_decimal/?sort=new
He had to plan most of it using pen and paper, because he doesn't even own a Wii U and had to do it using a friends console over the weekends.
It's pretty f***ing awesome, just look at this madness:
A video of the level can be found here:
https://youtu.be/rCTGXUNg2fE (no sound unfortunately)
A lot of things like item limits, despawning mechanics and of course space constraints had to be taken into account and it was not certain that it was even possible before he actually implemented it (7+7 is the highest which he could fit into these constraints).
He described how it works in a reddit post here (you can also find the level code there)
https://www.reddit.com/r/MarioMaker..._binary_adding_machine_with_decimal/?sort=new
He had to plan most of it using pen and paper, because he doesn't even own a Wii U and had to do it using a friends console over the weekends.
