I revisited ideas I had for Mario Maker 1 levels in this set of courses:
Fortress of the Hammer Legion: R2L-D3Q-WLF
What's everyone's least favorite enemy from the original SMB? Yep, it's the Hammer Bros. Because no one asked for it, here's a level with a bunch of them. Hammer Bros in Mario Maker 2 are easier than they were in the original Super Mario Bros. in that they only throw up to two hammers in sequence, but you still must be careful with them. There are helpful powerups hidden throughout the course; I put a coin over the ? Blocks with powerups in them. If you find the Star, start running and you might be able to nearly finish the level before it runs out!
Training For Plumber Athletes X: C6R-B05-WVG
A remake of one of my favorite Mario Maker 1 courses, this is much easier than it looks. Be ready to run fast and jump far!
Check Over The Plants: 7XC-VVH-NFF
There's a locked door and Key Coins up out of reach. How to get to them? There's got to be invisible blocks somewhere, but where? Where indeed, hmm... (points to the course title)
By the way, the easiest way I've currently found to get screenshots (such as these) off of Switch, without the hassle of taking out the Micro SD card, is to post them to a special-purpose (or just little-used) Facebook or Twitter account. Then you can save them to your computer's hard drive, and from there post them to Blogger.