Got very close to beating the puzzles, but the final puzzle, sector 5 mechanic test 3 finally beat me, I kneel, gravity-change-button.
But wow, what an engaging puzzle game, great design! The freeform line drawing also leads to a great feeling of freedom when solving puzzles. That feeling that you're kinda finding a solution that might not have been 100% intended is always wonderful. Probably not really that common with traditional puzzle games, I think that is a great strength of your game.
Only two bugs I encountered was one: the menu sometimes seems to keep returning to the first sector (even though at that time I had already beat it), and two: the music playing twice (not sure how I managed that, I think it was frantic clicking while having the first bug).
Music was very nice. I found it calming and relaxing while solving the puzzles. All in all a very good game you have going here.