Nice job! I love the theme interpretation.
I sadly ran into some duplicate-solution issues as well. I think it's probably very tough to eliminate them all.
I could see this game being used in an educational setting, to show the basics of layers and filter. I kinda want to see a 3D version of this now with booleans and blender-style modifiers (e.g., array, twist).
Oh wow, thanks so much. A 3D version of blender-style modifiers definitely could be fun. Yes, the puzzle design definitely still needs some work. For the first two the solution is clear and solvable, the last one especially, we noticed after playtesting that we overlooked the many alternative solutions that give a similar result.