I've spent some making custom Baba is You levels, and tinkering with custom levels for Portal 2, but this is my first time making puzzles for a more bare bones game.
I'm glad you enjoyed it and it wasn't too hard! Thank you for playing!
Right on, that's awesome. Well, you (and the other puzzle game makers I saw) did a great job of slowly building complexity across the levels. That classic design principle of "show us a mechanic, make us use the mechanic" was done to great effect!