What's Super Mario Maker?Super Mario Maker is a recently released game (9/11/15) where, you guessed it -- get to not only play, but make Super Mario levels, with a full editor with several items & blocks from the Super Mario Bros. series.
What does it have?Well...
Make ModeMake levels using the ingame editor! Edit sample levels, or start from scratch. Upload your creations to the internet and let others play them!
Play ModeThere's actually several modes for this.
10-Mario ChallengePlay pre-made levels from Nintendo, but here's the catch -- you have to play 8 levels, with 10 lives. You aren't permanently stuck with 10 (1UPs exist), but once they're out, game over!
Course WorldPlay levels from all around the internet! Attempt the 100 Mario Challenge, where you play random users' levels with 100 lives!
This OP will be updated with more info as I find it.
See next post for BLF Makers and their level IDs.