To make the image, click the robot. To select other resolutions go to the main page and click the monitor or smartphone.
Ah.. reminds me of this Mr Robot Apple game - https://en.wikipedia.org/wiki/Mr._Robot_and_His_Robot_Factor... where i can design my own maps..
If you use the mushroom you can not only make Mario larger, but other objects too.
All this time I was trying to figure out how to run it but then spotted the "Wallpaper Maker" in the title. Sad layfe :(
This is surprisingly fun! I just wish they had made the page available in some non-Japanese language (even French would do).
My kind of playground!
Any thoughts as to why Mario is not moveable?
I just found two secret parameters.
To get two extra items, namely ghost and star, append &opt=6358D569C9 to the link. Or use $('body').addClass('secret') in console.
To replace Mario with Toad (only in SMB), append &opt=7F93F702E6.
By using the latter opt, and adding secret manually, you can have both.