At the time of writing the working day is beginning in Japan, and Super Mario Maker is in stores courtesy of the country having a 10th September release date for the Wii U title. Ahead of time from a Western perspective, then, Nintendo has been good to its word of sharing the Art Design Booklet for the game for free online.
This booklet comes in its printed form with all physical retail editions, so this web-based PDF version is primarily in place for those that opt to buy the eShop version of the game. Naturally you're free to gawk at it regardless and get a sense for what's on offer.
In addition to some lovely designs to look upon, there are numbers there which... well, just explore the game and try them out.
You can check it out on this page if you so desire, or wait for your own copies later this week, of course.