Oh, wow! Thanks so much for the video playthrough, this is a goldmine worth of feedback honestly. Seeing the thought process going on in "realtime" points out a lot of which things are hard to figure out for the player and what changes I need to make (such as making it more obvious how the arrow block works exactly). There's also multiple bugs exposed this way that I didn't realize, such as placing objects on top of the spike ball, or the eraser not giving blocks back.
I also forgot to think of the possibility that people might find different solutions, but that's actually great.
For anyone curious, this was the "intended" solution for level 1: https://imgur.com/0Md3ifS (which in hindsight should've been swapped with level 2)