I created this mod a while ago, but wanted to share on here as well. I made a custom map that's available in the SC2 Arcade named "SC2 Puzzles" which is available in all regions. It was inspired by Blizzard's Starcraft Master and features 11 small micro challenges where you can see neat unit interactions.
The Tips menu will provide information on how to clear stages if you get stuck and I've also additionally uploaded video solutions to all of them on my youtube channel.