Thanks SAB, I actually came on this morning to ask what your level ID was. Have you unlocked all the stuff? Here is what you have to do if you haven't seen:
1.) Place every new object you have at least once, as well as clicking on any new themes. Wait for a few minutes between unlocks - but you have to actually be doing something as idling doesn't seem to work. Just actively mess around in the editor while you wait.
2.) Eventually, you'll get a message saying new tools will be available on (tomorrow's date).
3.) Place a large square of blocks. ? Blocks, Brick blocks, whatever you feel like.
4.) Hold L to enter Multi-Grab Mode and highlight the biggest chunk of Blocks you can.
5.) Hold ZL to enter Copy Mode and drag these blocks to copy them everywhere. About 5 or 6 times should do it.
6.) Release ZL. You should hear truck noises, followed by an early shipment unlock process.
7.) Repeat from step 1 to unlock everything.
Also Cheats!
CRT Mode
While the game is loading a level, hold down on the D-Pad and press A and B at the same time. If done correctly, the game will look as if played on a CRT TV screen. To disable it, do the same thing on the level loading screen.
Nintendo World Championships 2015 Levels and Weird Mushroom
To unlock the four Nintendo World Championships levels, complete the 10 Mario Challenge mode 7 times. Complete all four levels in Coursebot to unlock the Weird Mushroom item, which can be used in Course Maker by grabbing and shaking a Super Mushroom. It can only be used in Super Mario Bros. levels.
Mario Paint Fly Squating Game
When you remove a block or shake a muncher enemy and three little mosquito fly out, quickly tap on them to kill them. When you did it correct the Mario Paint Fly squatting game will launch. It won't happen with every block you move so it needs some trial and error. Completing this minigame unlocks the Builder Mario costume.
Title Screen Easter Egg
In the interactive title screen (the one where Mario stands in some level you can play if you want) you can touch the letters of the Super Mario Maker caption on the gamepad touchscreen. Every letter does do something different like spawning enemies or coins or taking off like a rocket after someone gives a countdown.
But yeah, the game is amazing and one of my favorites of the year. I wonder if we'll see some DLC in regards to more items, themes, etc. I would love to see the Super Mario All Stars themes in here.